5. Sophia - Intro to College Mathematics - Unit 5
In an experiment, a die is rolled and a coin is tossed. What is the probability of rolling a six, and then getting heads upon tossing the coin?
1/12
You attend a wedding and are second in line to get a slice of wedding cake. There are 3 slices of vanilla cake, 12 slices of chocolate cake, and 6 slices of red velvet cake left. They are being handed out by a waiter at random.What is the probability that both you and the person in line in front of you get red velvet cake?
1/14
Patricia was having fun playing a card game. To win the game, she needed the next two cards dealt to be yellow cards. There are 12 cards left in the deck, and three are yellow.What is the probability that the two cards dealt to Patricia will both be yellow?
1/22
A spinner has 10 sections of equal sizes. There are two red sections, two blue sections, two green sections, two orange sections, and two yellow sections.What is the probability that the spinner will land on orange?
1/5
you have 15 shirts in your closet (3 red, 4 blue, 5 pink, and 3 white) that are appropriate for work.If you select a shirt at random, what is the probability that you will choose a white shirt?
1/5
A standard deck of playing cards contains one queen of hearts, one queen of spades, one queen of diamonds, and one queen of clubs.What is the probability of drawing the queen of hearts from a well-shuffled deck of 52 cards?
1/52
The odds of rolling a 1 on a standard die are 1:5.What is the probability of getting a 1 upon rolling a die?
1/6
Last summer Chloe caught 32 trout, 20 catfish, 11 salmon, and 9 small-mouth bass.If Chloe goes fishing again next summer, and the fish populations have not changed, what is the probability that the first fish she catches will be a small-mouth bass?
1/8
There are 13 cards with diamonds in a standard deck of 52 cards.What is the probability of drawing a diamond from a standard deck of cards AND getting tails upon flipping a coin?
1/8
Chen randomly draws a card from a deck. The odds in favor of his drawing a blue card are 1:8.What is the probability that Chen will draw a blue card?
1/9
You have four $20 bills, ten $5 bills, and twelve $1 bills in your wallet.If you reach into your wallet twice, what is the probability that you will pull out a $1 bill the first time and a $5 bill the second time?
12/65
A pile of cards contains fourteen cards, numbered 1 through 14. What is the probability of NOT choosing the 10?
13/14
Rashid is playing a game where he selects a card from a deck of four cards, labeled 1, 2, 3, or 4. The possible cards and probabilities are shown in the chart below. CardProbability120%232%339%49% What is the expected value for the card that Rashid selects? 2.45 2.5 2.37 2.41
2.37
A bag contains 3 red balls and 5 green balls.What is the probability of picking a red ball from the bag AND getting heads upon flipping a coin?
3/16
A teacher is sorting students into teams by placing everyone's name into a bowl. There are 15 girls and 9 boys in the class.What is the probability that the first two names drawn are boys?
3/23
You visit an ice cream shop on a hot summer day. The shop offers 15 ice cream flavors, 3 types of cones, and 8 toppings.Assuming you want one ice cream flavor, one cone, and one topping, how many possible combinations can you create? 26 360 234 78
360
Jill mixes two types of concentrations of HCI (hydrochloric acid): 0.375 liters of 25% hydrochloric acid and 0.625 liters of 65% hydrochloric acid.What is the HCI concentration of the mixed solution? 44% 56% 40% 50%
50%
Ursula is looking at data about educators' salaries in different cities in the country (in thousands of dollars).For which data set would the mean be the best measure of center rather than the median? 48, 44, 41, 50, 38, 42, 92, 39 55, 52, 60, 65, 56, 63, 68, 58 48, 14, 42, 53, 49, 51, 55, 43 72, 78, 67, 81, 80, 76, 29, 70
55, 52, 60, 65, 56, 63, 68, 58
If the probability of a thunderstorm today is 2/9, then what is the complement or the probability of it NOT thunderstorming today?
7/9
Tom wanted to quantify the heights of all of the basketball players on his favorite teams.According to this histogram, what is the height range that is least common within his favorite teams? 74-76 inches 80-82 inches 78-80 inches 84-86 inches
84-86 inches
What does a wider normal distribution curve indicate about a data set? A large number of observations fall relatively far away from the mean, median, and mode. A large number of observations are concentrated close to the mean, median, and mode. The mode is larger than the median and the mean. The mode is smaller than the median and the mean.
A large number of observations fall relatively far away from the mean, median, and mode.
Amy wanted to review what others thought of a movie she was interested in before she rented it. She noticed that on the website from a large online retailer, the movie received an overall rating of 3.5 stars.Which of the following, if true, represents selection bias? Every person who rented the movie from the online retailer gave it a rating and a review. Amy only reads the 1-star reviews to make a decision on whether or not to rent the movie. Ratings and reviews for the movie were all submitted voluntarily to the online retailer's website. Amy reviews an equal number of different star ratings to get a sense of what all viewers thought about the movie.
Amy only reads the 1-star reviews to make a decision on whether or not to rent the movie.
Which pair of events are non-overlapping when rolling a single six-sided die? Getting a number greater than 5 Getting a number less than 3 Getting an even numberGetting a number less than 3 Getting a number greater than 3Getting a number less than 5 Getting an odd numberGetting a prime number
Getting a number greater than 5 Getting a number less than 3
Abel is playing a game with a standard deck of cards and randomly chooses a spade on his first draw.Which of the following statements is true? Whether or not these are dependent or independent events depends on what type of card Abel draws next. If Abel draws a spade, does not replace the card, and draws again, these will be independent events. If Abel draws a spade, replaces the card, re-shuffles, and draws again, these will be dependent events. If Abel draws a spade, replaces the card, re-shuffles, and draws again, these will be independent events.
If Abel draws a spade, replaces the card, re-shuffles, and draws again, these will be independent events.
Michael checked several websites and stores around town for the television he wanted to purchase. He saw eight different prices: $155$267$284$194$300$284$287$179 What is the mean, median, and mode of this data set? Mean = $284Median = $243.75Mode = $299 Mean = $275.50Median = $299Mode = $243.75 Mean = $284Median = $243.75Mode = $275.50 Mean = $243.75Median = $275.50Mode = $284
Mean = $243.75Median = $275.50Mode = $284
Select the correct description of this distribution curve. Left-skewed: mean > mode Right-skewed: mean < mode Left-skewed: mean < mode Right-skewed: mean > mode
Right-skewed: mean > mode
You believe that most American men under the age of 25 prefer pizza over tacos. You design an experiment with 50 men to test this hypothesis.What is the sample in your experiment? American men under the age of 25 Pizza Tacos The 50 men
The 50 men
Max wanted to test a new dishwasher detergent to see if it was less likely to leave residue on his dishes.Which of the following would be the null hypothesis in Max's experiment? The old detergent will leave more residue than the new detergent. The new detergent will leave more residue than the old one. The new detergent is equally likely to leave residue compared to the old detergent. The new detergent will leave less residue than the old one.
The new detergent is equally likely to leave residue compared to the old detergent.
Polly likes to grow tomatoes in her garden, and wonders if organic pesticide is as effective as non-organic pesticide at keeping worms off of her tomato plants. She designs an experiment to test both pesticides, which she conducts for one summer.Which statement is true of this experiment? The duration of her experiment is the explanatory variable. The number of worms on her plants is the explanatory variable. The number of worms on her plants is the response variable. The type of pesticide used is the response variable.
The number of worms on her plants is the response variable.
In a bolt-manufacturing factory, it is estimated that 3% of the bolts being manufactured will be defective, with a 0.4% margin of error.Choose the statement that correctly describes the confidence interval. The percentage of defective bolts is between 3% and 4%. The percentage of defective bolts is 3% or less. The percentage of defective bolts is between 2.6% and 3.4%. The percentage of defective bolts is 3% or more.
The percentage of defective bolts is between 2.6% and 3.4%.
Katherine, Jonathan, and Ryan went bowling. Afterward, they decided to make bar graphs to plot their scores.Ryan created Graph 1 and Jonathan created Graph 2 and noticed that their graphs look very different. What makes Graph 2 misleading? The horizontal axis should be in terms of scores instead of names. The scale of intervals on the horizontal axis is inconsistent. The scale of intervals on the vertical axis is inconsistent. The vertical axis should be in terms of pins knocked over instead of scores.
The scale of intervals on the vertical axis is inconsistent.
According to this bar graph, what is the mode? SUVs Trucks Convertibles Sedans
Trucks
Shelley buys a lottery ticket. The ticket has several ways to win.The table below shows the different ways to win, the probability of winning each way, and how much money each win results in. Every time Shelley buys a ticket, she can win money each way. Ways to WinProbabilityWinningsWay 142%$1Way 238%$5Way 319%$10Way 41%$100 Given the probabilities and payout values in this table, what is the expected value of Shelley's ticket? a.) $5.22 b.) $4.55 c.) $6.70 d.) $3.50
a.) $5.22
In preparation for a project, Maisie wanted to quantify the heights of all of the plants in her flower garden. According to this histogram, what is the plant height that appears most commonly in Maisie's garden? a.) 30-40 inches b.) 40-50 inches c.) 20-30 inches d.) 60-70 inches
a.) 30-40 inches
To prepare for a lab experiment, Ted is making a solution that uses two types of concentrations of HCl (hydrochloric acid): 80 mL of 50% HCl solution, and 120 mL of 20% HCl solution.What is the HCI concentration of the mixed solution? a.) 32% b.) 9% c.) 91% d.) 38%
a.) 32%
You are planning an event for work that will include a dinner. Each attendee can choose a 3-course meal from a menu of 7 appetizers, 3 entrees, and 2 desserts.How many different combinations of 3-course meals are possible? a.) 42 b.) 24 c.) 12 d.) 36
a.) 42
Alaric wants to determine if he can get a better grade in math by studying for longer periods of time. He plans to experiment for 4 weeks.Which statement is true of this experiment? a.) Alaric's math grade is the response variable. b.) Alaric's math grade is the explanatory variable. c.) The duration of Alaric's experiment is the explanatory variable. d.) The amount of time Alaric spends studying is the response variable.
a.) Alaric's math grade is the response variable.
According to this bar graph, what is the mode? a.) B b.) D c.) F d.) C
a.) B
Which of the following describes independent events? a.) Ben randomly flips a standard two-sided coin. The first time he flips it, he gets heads. The second time he flips it, he gets tails. b.) Bailey randomly picks colored marbles from a bag. She first selects a red marble from the bag, and gives it to a friend. She then selects a green marble from the bag. c.) Benny randomly selects what chores to do from his chore list. He selects making his bed first, and crosses the chore off his list. Next, he chooses to vacuum the room. d.) Beanie randomly chooses a Queen from a standard deck of cards. She sets the card aside and chooses again. This time, she chooses an Ace.
a.) Ben randomly flips a standard two-sided coin. The first time he flips it, he gets heads. The second time he flips it, he gets tails.
A pet store owner wants to gather feedback about the overall quality of his store.Which example demonstrates selection bias? a.) He gathers data by interviewing only customers who own cats. b.) He gathers data from customers who willingly respond to his questionnaire. c.) He gathers data by interviewing every other customer who enters his store. d.) He gathers data by interviewing every 5th customer who enters his store.
a.) He gathers data by interviewing only customers who own cats.
Select the correct description of this skewed distribution curve. a.) Left-skewed: more values lie to the right of the mean. b.) Left-skewed: more values lie to the left of the mean. c.) Right-skewed: more values lie to the left of the mean. d.) Right-skewed: more values lie to the right of the mean.
a.) Left-skewed: more values lie to the right of the mean.
Select the correct description of this skewed distribution curve. a.) Left-skewed: the median lies to the right of the mean b.) Right-skewed: the median lies to the right of the mean c.) Left-skewed: the median lies to the left of the mean d.) Right-skewed: the median lies to the left of the mean
a.) Left-skewed: the median lies to the right of the mean
Determine the mean, median, and mode for the following data set, which shows recent real estate sales in your neighborhood (in thousands of dollars):180, 270, 310, 250, 440, 320, 290, 270, 330, 340 a.) Mean = 300Median = 300Mode = 270 b.) Mean = 270Median = 295Mode = 440 c.) Mean = 290Median = 295Mode = 300 d.) Mean = 320Median = 270Mode = 275
a.) Mean = 300Median = 300Mode = 270
Which of the following describes dependent events? a.) Renata randomly chooses a chocolate chip cookie from a cookie jar. She eats the cookie and chooses again. This time she gets a sugar cookie. b.) Rudolph randomly picks names out of a hat. He chooses "Mark" first. He puts Mark's name back in the hat and chooses again. This time he chooses "Indira." c.) Rocky tosses a six-sided die that lands on the number 1. Next, he picks a card from a standard deck of playing cards and gets the number 4. d.) Rufus spins a spinner and it randomly lands on the number 7. Rufus spins the spinner again, and it lands on the number 7 again.
a.) Renata randomly chooses a chocolate chip cookie from a cookie jar. She eats the cookie and chooses again. This time she gets a sugar cookie.
After a set of surveys was compiled and analyzed, the mean value was reported as 10.5 ± 0.8.Select the true statement for this data. a.) The estimate is equal to 10.5 and the margin of error is equal to ± 0.8. b.) The estimate is equal to 10.5 and the confidence interval is equal to ± 0.8. c.) The margin of error is equal to 10.5 and the estimate is equal to ± 0.8. d.) The margin of error is equal to ± 0.8 and the confidence interval is equal to 10.5.
a.) The estimate is equal to 10.5 and the margin of error is equal to ± 0.8.
Martina is a scientist who is studying the effects of a new diabetes medication. She sets up an experiment and divides participants into two groups. Group A gets a placebo; Group B gets the new drug.Which of the following is a correct pairing of possible null and alternative hypotheses for this experiment? a.) The null hypothesis is that Groups A and B report no difference in diabetes issues.The alternative hypothesis is that Group B reports fewer diabetes issues than Group A. b.) The null hypothesis is that Group A and B report no difference in diabetes issues.The alternative hypothesis is that both Group A and Group B report fewer diabetes issues. c.) The null hypothesis is that Group B reports fewer diabetes issues than Group A.The alternative hypothesis is that Group A and Group B report no difference in diabetes issues.
a.) The null hypothesis is that Groups A and B report no difference in diabetes issues.The alternative hypothesis is that Group B reports fewer diabetes issues than Group A.
Greta and Greg are twins. Their parents want to know if watching television helps or harms language development. They design a long-term experiment in which Greta watches twice as much television as Greg every day.Which statement is true of this experiment? a.) The twins' language development is the response variable. b.) The amount of television that each twin watches is the response variable. c.) The twins' language development is the explanatory variable. d.) The twin's language development and the amount of television that each twin watches are both explanatory variables.
a.) The twins' language development is the response variable.
The graph below shows two different types of plans published by a cell company. Ryan claims that the cost of Plan A and Plan B differ a lot.Which statement best explains why Ryan was misled by the graph? a.) The two graphs use different vertical scales. b.) The graph of Plan A shows a gradual increase in price. c.) The scale of intervals on the horizontal axis of both graphs is inconsistent. d.) The graph of Plan B shows a rapid increase in price.
a.) The two graphs use different vertical scales.
The bar graph below shows the net sales of a magazine company over the years. Based on the graph, Dan claims that the net sales of magazines in 2008 are twice the net sales in 2006.Which statement explains why the graph is misleading? a.) The vertical scale representing dollars is distorted. b.) The vertical axis should be in terms of the number of magazines instead of net sales c.) The scale of intervals on the horizontal axis is inconsistent. d.) The horizontal axis should be in terms of months instead of years.
a.) The vertical scale representing dollars is distorted.
The bar graph below shows the profits made by an industry over the years. Based on the graph, Richard claims that the profits made in 2007 are more than double the profits made in 2006.Which statement explains why the graph is misleading? a.) The vertical scaling exaggerates the difference between 2006 and 2007. b.) The graph does not show any sales data prior to 2006. c.) The horizontal axis should be in terms of months instead of years. d.) The scale of intervals on the horizontal axis is inconsistent.
a.) The vertical scaling exaggerates the difference between 2006 and 2007.
n a normal distribution curve, the center of the curve represents the __________. a.) mean, median, and mode b.) mode only c.) mean only d.) mean and mode only
a.) mean, median, and mode
The shape of a normal distribution curve is always __________. a.) symmetrical b.) narrow c.) asymmetrical d.) wide
a.) symmetrical
According to this histogram, what is the approximate mode? a.) 25 inches b.) 15 inches c.) 24 inches d.) 4 inches
b.) 15 inches
To prepare for surgery, Anne mixes an anesthetic solution using two different concentrations: 40 mL of 25% solution and 60 mL of 40% solution.What is the concentration of the mixed solution? a.) 31% b.) 34% c.) 48% d.) 52%
b.) 34%
You visit a pizzeria that lets you build your own pizza. They have 2 types of dough (white or wheat), 3 types of cheese, and 6 types of toppings.If each pizza consists of a type of dough, one cheese, and one topping, how many different pizzas can you build? a.) 11 b.) 36 c.) 33 d.) 72
b.) 36
Rashida is analyzing her students' test scores.For which data set would the median be a better choice as a measure of center rather than the mean? a.) 80, 83, 87, 84, 79, 81, 80, 77 b.) 93, 95, 88, 38, 79, 85, 88, 90 c.) 99, 95, 93, 90, 88, 92, 87, 91 d.) 67, 72, 75, 74, 68, 69, 70, 65
b.) 93, 95, 88, 38, 79, 85, 88, 90
Which example is free from participation bias? a.) A teacher asking students to voluntarily report how many hours they spend doing homework each night b.) A school requiring every student to fill out a survey about the school's extracurricular offerings c.) A town council holding an open town meeting to gather feedback on people's property tax rates d.) A website offering a discount code if you leave a review of their product
b.) A school requiring every student to fill out a survey about the school's extracurricular offerings
Laura is reviewing the following graph of economic data from 2008-2012. According to this line chart, when was GDP growth equal to 4? a.) In the middle of 2011 b.) At the beginning of 2010 c.) In the beginning of 2009 d.) At the end of 2010
b.) At the beginning of 2010
which of these are overlapping events? a.) Drawing an Ace and drawing an 8 from a standard deck of cards b.) Drawing a Jack and diamond from a standard deck of cards c.) Drawing a black card and drawing a diamond from a standard deck of cards d.) Drawing a face card and drawing a 3 from a standard deck of cards
b.) Drawing a Jack and diamond from a standard deck of cards
Four researchers are each conducting an experiment to test whether talking to plants helps them grow faster. Each researcher puts 10 plants in a room, where they are talked to every day, and 10 more in another room where they are not talked to at all.Select the researcher who is applying control variables correctly. a.) Mathilda varies the amount of water that each plant is given. b.) Harvey makes sure that the plants in both rooms are planted in the same soil. c.) Alphonse feeds each set of plants a different kind of fertilizer. d.) Jackie decreases the light levels in one of the rooms to test if that also has an effect on growth.
b.) Harvey makes sure that the plants in both rooms are planted in the same soil.
In what way does practicing probability and statistics strengthen your employability skills? a.) It helps you to better understand your personal strengths and weaknesses. b.) It enables you to make decisions based on logic, rather than other factors like emotion. c.) It allows you to better communicate your ideas to a variety of audiences. d.) It gives you the confidence to follow your instincts, regardless of what the data shows.
b.) It enables you to make decisions based on logic, rather than other factors like emotion.
Determine the mean, median, and mode for the following data set, which shows the ages of all of the employees at your company:18, 26, 27, 30, 25, 40, 32, 29, 31, 32 a.) Mean = 27Median = 28.5Mode = 40 b.) Mean = 29Median = 29.5Mode = 32 c.) Mean = 30Median = 29Mode = 31 d.) Mean = 29.5Median = 30Mode = 40
b.) Mean = 29Median = 29.5Mode = 32
Uma has an overweight dog. She wants to determine if her dog can lose weight by switching to a new brand of dog food. She plans to experiment with this new food for 6 months.Which statement is true of this experiment? a.) The weight of her dog is the explanatory variable. b.) The new brand of dog food is the explanatory variable. c.) The duration of the experiment is the response variable. d.) The weight of her dog and the new brand of dog food are both response variables.
b.) The new brand of dog food is the explanatory variable.
Wei buys a lottery ticket. The ticket has several ways to win.The table below shows the different ways to win, the probability of winning each way, and how much money each win results in. Every time Wei buys a ticket, she can win money each way. Ways to WinProbabilityWinningsWay 168%$0Way 224%$0Way 36%$5Way 42%$25 Given the probabilities and payout values in this table, what is the expected value of Wei's ticket? a.) $0.88 b.) $0.95 c.) $0.80 d.) $1.02
c.) $0.80
Brianna buys a lottery ticket. The ticket has several ways to win.The table below shows the different ways to win, the probability of winning each way, and how much money each win results in. Every time Brianna buys a ticket, she can win money each way. Ways to WinProbabilityWiningsWay 135%$1Way 240%$5Way 320%$10Way 45%$25 Given the probabilities and payout values in this table, what is the expected value of Brianna's ticket? a.) $2.50 b.) $1.50 c.) $5.60 d.) $4.60
c.) $5.60
The probability of randomly picking out a book of poetry from a bookshelf is .What are the odds in favor of choosing a book of poetry? a.) 3:13 b.) 7:13 c.) 3:7 d.) 7:3
c.) 3:7
Which example demonstrates participation bias? a.) A clothing store collects surveys from every customer whose order totals more than $100. b.) A doctor's office conducts a quality review of their medical charts by randomly reviewing every third chart. c.) A study concludes that adults generally prefer whole milk over skim milk, based on voluntarily submitted data. d.) A study that only tested one type of insect concludes that a certain pesticide is more effective for defending tomato plants against all pests.
c.) A study concludes that adults generally prefer whole milk over skim milk, based on voluntarily submitted data.
Which of these are overlapping events? a.) Drawing a Jack of diamonds or a Queen of spades from a standard deck of cards b.) Drawing a face card or a 7 from a standard deck of cards c.) Drawing a black card or a King from a standard deck of cards d.) Drawing a heart or a spade from a standard deck of cards
c.) Drawing a black card or a King from a standard deck of cards
In what way does practicing probability and statistics strengthen your employability skills? a.) It helps you to forget about past mistakes and focus only on the future. b.) It helps you to adapt quickly and effortlessly to any changing circumstances. c.) It helps you to reach your personal and professional goals more efficiently. d.) It helps you to think innovatively and design new solutions for old problems.
c.) It helps you to reach your personal and professional goals more efficiently.
Select the correct description of this skewed distribution curve. a.) Left-skewed: the mode lies to the left of the mean b.) Right-skewed: the mode lies to the right of the mean c.) Right-skewed: the mode lies to the left of the mean d.) Left-skewed: the mode lies to the right of the mean
c.) Right-skewed: the mode lies to the left of the mean
After a set of surveys was compiled and analyzed, the mean value was reported as 5.1 ± 0.4.Select the true statement for this data. a.) The estimate is equal to ± 0.4 and the confidence interval is 4.7 to 5.5. b.) The margin of error is equal to 5.1 and the estimate is equal to ± 0.4. c.) The estimate is equal to 5.1 and the confidence interval is 4.7 to 5.5. d.) The margin of error is equal to ± 0.4 and the confidence interval is 5.1.
c.) The estimate is equal to 5.1 and the confidence interval is 4.7 to 5.5.
Caroline is testing a new hair loss cream on groups of patients to see whether or not it actually works. Group A uses the cream every day, while group B uses it only once a week.Which of the following is a correct pairing of possible null and alternative hypotheses for this experiment? a.) The null hypothesis is that group A does not lose any hair.The alternative hypothesis is that group A does still lose some hair. b.) The null hypothesis is that group A loses less hair than group B.The alternative hypothesis is that group B loses less hair than group A. c.) The null hypothesis is that groups A and B show no difference in hair loss.The alternative hypothesis is that group A loses less hair than group B. d.) The null hypothesis is that neither group loses any hair.The alternative hypothesis is that only group A loses no hair.
c.) The null hypothesis is that groups A and B show no difference in hair loss.The alternative hypothesis is that group A loses less hair than group B.
A group of elementary school students designed a study to find a possible relationship between the number of students absent from school and the overall rate of flu infections in their town.Which of the following is a correct pairing of possible null and alternative hypotheses for this experiment? a.) The null hypothesis is that as the flu infection rate decreases, the number of students absent from school also decreases.The alternative hypothesis is that as the flu infection rate increases, the number of students absent from school increases. c.) The null hypothesis is that the flu infection rate has no impact on the number of students absent from school.The alternative hypothesis is that as the flu infection rate increases, the number of students absent from school also increases.
c.) The null hypothesis is that the flu infection rate has no impact on the number of students absent from school.The alternative hypothesis is that as the flu infection rate increases, the number of students absent from school also increases.
You are trying to guess the passcode to a phone. The passcode consists of three digits, and each digit can be any of the 10 numbers from 0-9.How many different combinations of a 3-digit passcode are possible? a.) 90 b.) 300 c.) 900 d.) 1,000
d.) 1,000
To prepare for a lab experiment, Brad is making a solution that uses two types of concentrations: 75 mL of 50% salt and 125 mL of 10% salt.What is the salt concentration of the mixed solution? a.) 35% b.) 83% c.) 16% d.) 25%
d.) 25%
The probability of randomly picking out a paperback book from a bookshelf is 2/5 .What are the odds in favor of choosing a paperback book? a.) 2:5 b.) 2:7 c.) 3:2 d.) 2:3
d.) 2:3
Janet is analyzing temperatures she recorded for an experiment.For which data set would the mean be an appropriate choice as a measure of center? a.) 54, 51, 59, 90, 49, 60, 52, 53 b.) 32, 35, 84, 29, 25, 22, 30, 34 c.) 82, 90, 91, 87, 77, 29, 80, 83 d.) 75, 78, 82, 68, 72, 71, 77, 80
d.) 75, 78, 82, 68, 72, 71, 77, 80
A car dealership is quantifying the types of vehicles it has sold since its founding. According to this bar graph, what has been the dealership's second-most popular vehicle model? a.) Challenger b.) Mustang c.) Camaro d.) Accord
d.) Accord
You read that 75% of Americans over the age of 30 prefer Coke over Pepsi. You want to test this by designing an experiment with 100 people.Which of the following is the population in your experiment? a.) The 100 people b.) Coke and Pepsi c.) All Americans d.) All Americans over the age of 30
d.) All Americans over the age of 30
Which of these are non-overlapping events? a.) Drawing a black card and drawing an Ace of spades from a standard deck of cards b.) Drawing a black card and drawing a 7 from a standard deck of cards c.) Drawing a face card and drawing a Queen from a standard deck of cards d.) Drawing a red card and drawing a six of clubs from a standard deck of cards
d.) Drawing a red card and drawing a six of clubs from a standard deck of cards
In what way does practicing probability and statistics strengthen your employability skills? a.) It helps you to better identify technological tools that will make you a more efficient worker. b.) It helps you to be a better listener and to be more responsive to others. c.) It helps you to work well with others and establish stronger personal connections. d.) It helps you to make better-informed, more educated decisions.
d.) It helps you to make better-informed, more educated decisions.
In the past month, Ryan has had five pizzas delivered. He kept a record of how long it took to get the pizzas: 20 minutes, 28 minutes, 35 minutes, 40 minutes, and 25 minutes.If the sixth time he orders pizza, it takes 95 minutes, how will this affect his data? a.) It will have little to no effect on the mean, but it will make the median a less useful measure of center. b.) It will make both the mean and the median less useful measures of center. c.) It will have little to no effect on both the mean and the median. d.) It will have little to no effect on the median, but it will make the mean a less useful measure of center.
d.) It will have little to no effect on the median, but it will make the mean a less useful measure of center.
Determine the mean, median, and mode for the following data set, which shows online reviews of a restaurant:1, 4, 2, 5, 3, 4, 1, 4, 4, 3 a.) Mean = 3.5Median = 4Mode = 5 b.) Mean = 3.4Median = 4Mode = 3.5 c.) Mean = 4Median =3.1Mode = 3.5 d.) Mean = 3.1Median = 3.5Mode = 4
d.) Mean = 3.1Median = 3.5Mode = 4
Which of the following describes dependent events? a.) Ophelia's pencil case contains a mix of colored pencils. She randomly pulls a red pencil out of the case, draws a monster, and puts the pencil back in the case. Next, she randomly pulls out a yellow pencil. b.) Omar randomly selects socks from a drawer. On Monday, he chooses a pair of dinosaur socks. Even though he wears them all day, he puts them back in the drawer on Monday night. On Tuesday, he chooses rainbow socks. c.) Octavia randomly chooses a diamond from a standard deck of cards. She places the card back in the deck, reshuffles, and chooses again. This time, she chooses a spade. d.) Otis randomly selects a raffle winner from a bucket full of raffle tickets. After selecting the first winner, he puts the winner's ticket aside and selects the next winner from the bucket.
d.) Otis randomly selects a raffle winner from a bucket full of raffle tickets. After selecting the first winner, he puts the winner's ticket aside and selects the next winner from the bucket.
Lori puts up a sign for her business 500 meters from the main entrance. She once read that it takes the average adult 6 minutes to walk 500 meters. She decides to test this by having 200 adults walk the 500 meters from her sign to her store.Which of the following is the sample in Lori's experiment? a.) The average of 6 minutes b.) All adults c.) The 500 meters d.) The 200 adults
d.) The 200 adults
After a set of surveys was compiled and analyzed, the mean value was reported as 42 ± 3.Select the true statement for this data. a.) The estimate is equal to ± 3 and the confidence interval is 39 to 45. b.) The margin of error is equal to ± 3 and the confidence interval is 42. c.) The margin of error is equal to 42 and the estimate is equal to ± 3. d.) The margin of error is equal to ± 3 and the confidence interval is 39 to 45.
d.) The margin of error is equal to ± 3 and the confidence interval is 39 to 45.
A narrow normal distribution curve indicates that a large number of observations are concentrated __________. a.) far away from the mean b.) close to the mean, but far from the median c.) close to the mode, but far from the mean d.) close to the mean
d.) close to the mean
