Unit 1-Challenge #1 Statistics Fundamentals

A company packed 8 dark chocolates in a box of 32 assorted chocolates.Which of these does NOT represent inferential statistics? a.)25% of the chocolates in a box are dark chocolates. b.)25% of the chocolates manufactured in a batch are dark chocolates. c.)25% of the chocolates packed in a day are dark chocolates. d.)25% of the chocolates manufactured in a factory are dark chocolates.

25% of the chocolates in a box are dark chocolates. inferential statistics allows us to make inferences about a population based on some sample value. So noting that there are 25% of chocolates in a box is an example of a descriptive statistic. If we were to use that information to make broader inference, then it would be inferential.

Which of these data sets does NOT represent continuous data? a.)Weights of potatoes in a sack b.)Heights of trees at a nursery c.)Rainfall readings during a week d.)Gender of students in a college

Gender of students in a college gender is qualitative because it can only take a certain number of values (male, female). So gender of college students cannot be continuous data.

Select the two categories that would yield qualitative data. a.)Type of pet b.)Pet owner's monthly income c.)Age of pet d.)Color of pet e.)Pet's purchase price

Type of pet Color of pet ANSWER RATIONALE qualitative data can only be put into categories. The type of pet (dog, cat, etc.) and the color of the pet (brown, black, etc.) can only be put into categories and can only yield qualitative data. The price of the pet ($5, $75, etc.), the age of the pet (2 years, 6 years, etc.), and the pet owner's monthly income ($1,500, $2,100, etc.) can only be expressed with numbers. Therefore, these are examples of quantitative data instead of qualitative data.

Select the two categories that would yield quantitative data. a.)Weight of pet b.)Color of pet c.)Gender of pet d.)Type of pet e.)Age of pet

Weight of pet Age of pet Age and weight can only be expressed with numbers. Therefore, these are examples of quantitative data. Type of the pet (fish, dog, etc), color of the pet (brown, black, etc.), and gender of the pet can only be put into categories. Therefore, these are examples of qualitative data instead of quantitative data.

You find some public records about customer satisfaction in the company's archive. What type of data is this called? a.)peer-reviewed data b.)biased data c.)available data d.)raw data

available data. Since the data is already collected and public record it would be considered available data.

The amount spent on pet food each month is an example of _____ data. a.)qualitative b.)nominal c.)quantitative d.)ordinal

quantitative data Since the amount spent on a pet can only be expressed with numbers, it is considered quantitative data.

If numbers collected from a survey are measurements, what are these measurements called before you perform any calculations? a.)biased data b.)available data c.)peer-reviewed data d.)raw data

raw data Since no operations are performed, the data is simply raw data.

A survey on Internet usage was conducted among a group of 200 students in the school cafeteria. It was found that 100 students spend at least two hours online every day.Which of these is an example of descriptive statistics? a.)50% of the students in the school spend at least two hours online each day. b.)50% of the students in the cafeteria spend at least two hours online each day. c.)50% of the students surveyed spend at least two hours online each day. d.)50% of the students in a class spend at least two hours online each day.

50% of the students surveyed spend at least two hours online each day. descriptive statistics simply notes what we find in some samples. Since we are simply noting how many people in the survey spend at least two hours on the Internet, this is a descriptive statistic about the survey.

Which of these data sets represent continuous data? a.)Monthly salaries of employees b.)Numbers of tickets sold for a football game c.)Heights of members of a baseball team d.)Number of questions answered correctly in a multiple-choice quiz

Heights of members of a baseball team Since height can take on any value inside an interval, measuring the heights of each team member would create a continuous data set.

If you are using new information in a survey that was not collected during previous surveys, you will be using _______ to gauge customer satisfaction. a.)peer-reviewed data b.)biased data c.)raw data d.)available data

raw data raw data is typically not previously available. Since the information from this survey had not been made available from previous surveys, you are using a form of raw data.

A bakery owner asked 150 customers to taste a new type of cookie and found that 60 people liked its taste.Which of these is an example of descriptive statistics? a.)40% of the people in the city where the bakery is located like the taste of the cookie. b.)40% of all the bakery's customers like the taste of the cookie. c.)40% of the surveyed customers like the taste of the cookie. d.)40% of all people like the taste of the cookie.

40% of the surveyed customers like the taste of the cookie. descriptive statistics simply notes what we find in some sample. So noting that 40% of the people sampled in the survey like the taste is simply a descriptive statistic of what was found in that survey.

Which of these data sets represent discrete data? a.)Number of questions answered incorrectly in a multiple-choice quiz b.)Temperature readings for Tuesday afternoon c.)Snowfall that fell last night in Maine d.)Time spent in running 1 mile

Number of questions answered incorrectly in a multiple-choice quiz discrete data can only take on a set number of values in an interval. In a multiple-choice quiz, the total number of correct answers must be something like 0, 1, 2, etc. Tallying the number of incorrect answers would create a discrete data set.