qumt second
What is the probability that you reach into the jar and randomly grab a nickel and then, without replacement, another nickel? Express your answer as a fraction or a decimal number rounded to four decimal places. (17p,19n,10d,21q)
(19/67)*(18/66) Probability of the first and the second nickels without replacement
A certain insecticide kills 80% of all insects in laboratory experiments. A sample of 1414 insects is exposed to the insecticide in a particular experiment. What is the probability that no insect will survive? Round your answer to four decimal place
(NO INSECT SURVIVE) instead of putting 80 you put 20 in probability IT CANNOT BE GREATER THAN ONE
classical probability
(theoretical probability) is the most precise type of probability and can only be calculated when all possible outcomes in the sample space are down and equally likely to occu
There are 126 identical plastic chips numbered 1 through 126 in a box. What is the probability of reaching into the box and randomly drawing a chip number that is greater than 44? Express your answer as a simplified fraction or a decimal rounded to four decimal places.
126-44=82 (82/126)
Out of 350 applicants for a job, 157 are female and 63are female and have a graduate degree. Step 1 of 2: What is the probability that a randomly chosen applicant has a graduate degree, given that they are female? Express your answer as a fraction or a decimal rounded to four decimal places. tep 2 of 2: If 115 of the applicants have graduate degrees, what is the probability that a randomly chosen applicant is female, given that the applicant has a graduate degree? Express your answer as a fraction or a decimal rounded to four decimal places.
63/157=answer 2) 63/115
relative frequency probablity
???
sum of dice
N 1 2 3 4 5 6 -------------- 1 | 2 3 4 5 6 7 2 | 3 4 5 6 7 8 3 | 4 5 6 7 8 9 4 | 5 6 7 8 9 10 5 | 6 7 8 9 10 11 6 | 7 8 9 10 11 12
Assume the random variable X has a binomial distribution with the given probability of obtaining a success. Find the following probability, given the number of trials and the probability of obtaining a success. Round your answer to four decimal places.
binomial calc
Selecting a 33 from a standard deck of cards
classical
You believe you have a 1/2 chance of drawing a red card from a standard deck of cards
classical
The number of customer complaints received each day.
discrete
A certain insecticide kills 60% of all insects in laboratory experiments. A sample of 1111 insects is exposed to the insecticide in a particular experiment. What is the probability that exactly 55 insects will survive? Round your answer to four decimal places.
instead of putting 60 in probability you put 40 since its asking for survive binomial calculator
subjective probability
is an educated guess regarding the chance that an event will occur
A box contains 13 large marbles and 20 small marbles. Each marble is either green or white. 5 of the large marbles are green, and 13 of the small marbles are white. If a marble is randomly selected from the box, what is the probability that it is small or green? Express your answer as a fraction or a decimal number rounded to four decimal places.
needs work
Cars enter a car wash at a mean rate of 22 cars per half an hour. What is the probability that, in any hour, exactly 44 cars will enter the car wash? Round your answer to four decimal places.
poisson calc
In a school district, all sixth grade students take the same standardized test. The superintendant of the school district takes a random sample of 3030 scores from all of the students who took the test. She sees that the mean score is 127127 with a standard deviation of 21.164421.1644. The superintendant wants to know if the standard deviation has changed this year. Previously, the population standard deviation was 2626. Is there evidence that the standard deviation of test scores has decreased at the α=0.01α=0.01 level? Assume the population is normally distributed.
s^2= mean standard dev o^2= popu stand
If you draw a card with a value of five or less from a standard deck of cards, I will pay you $37. If not, you pay me $12 (Aces are considered the highest card in the deck.) 2)If you played this game 738 times how much would you expect to win or lose? Round your answer to two decimal places. Losses must be expressed as negative values.
winning amount (37*16/52)+ lossing amount (-12*36/52) (37*16/52)+(-12*36/52)=3.08 2) 738* 3.08
A certain insecticide kills 70% of all insects in laboratory experiments. A sample of 12 insects is exposed to the insecticide in a particular experiment. What is the probability that exactly 3 insects will die? Round your answer to four decimal places.
put as normal since its asking for deaths
