AP Statistics Chapter 5 Review

About 7% of men in the United States have some form of red-green color blindness. Suppose we want to simulate randomly selecting 4 U.S. adult males to determine the probability that at least one is red-green color-blind. Which of these are correct assignments of digits for this simulation?

• 0-7 = color-blind, 8-9 = not color-blind

• 1-6 = color-blind, 7-10 = not color-blind

• 01-07 = color-blind, 08-99 & 00 = not color-blind

• 00-10 = color-blind, 11-99 = not color-blind

The two-way table above gives information about the grades for the semester in Mrs. Hardcase’s English class.

Given that the grade is an A, what is the probability of the student being female?

• 8/20

• 12/20

• 8/44

• 12/56

The probability that a randomly selected student in AP Statistics will do their closer on time is 0.18. What's the probability that out of a group of 6 students, at least one of them will turn their closer on time?

• 0.000034

• 0.82

• 0.304

• 0.696

• 0.18

The probability that a randomly selected student in AP Statistics will do their closer on time is 0.18. What's the probability that out of a group of 6 students, none of them turn their closer in on time?

• 0.000034

• 0.82

• 0.304

• 0.696

• 0.18

Let's pretend that on this test last year students averaged a 6 out of 10 on the multiple choice section with a standard deviation of 2. If Mrs. O was feeling crazy and doubled each MC score then subtracted 1, what would the new mean and standard deviation be?

• mean = 6, sd = 2

• mean = 12, sd = 4

• mean = 11, sd = 3

• mean = 11, sd = 4

• mean = 12, sd = 3

The two-way table above gives information about the grades for the semester in Mrs. Hardcase’s English class.

What is the probability a randomly selected student got an A or B for the semester?

• 15/100

• 20/100

• 35/100

• 65/100

A marketing survey compiled data on the number of personal computers in households. If X = the number of computers in a randomly-selected household, and we omit the rare cases of more than 5 computers, then X has the given distribution. The expected value of X is E(X) =

• 0.40

• 1.00

• 1.45

• 1.66

• 2.50

Which of the following is a true statement?

• The binomial setting requires that there are only two possible outcomes for each trial, while the geometric setting permits more than two outcomes.

• A geometric random variable takes on integer values from 0 to n.

• If X is a geometric random variable and the probability of success is 0.85, then the probability distribution of X will be skewed left, since 0.85 is closer to 1 than to 0.

• There is a fixed number of trials in a geometric setting, and the number of trials varies in a binomial setting.

• The distribution of every geometric random variable is skewed right

Let the random variable X represent the profit made on a randomly selected day by a certain store. Assume that X is approximately Normal with mean $360 and standard deviation $50. The least profitable 10% of days have a profit of at most how many dollars?

• $244

• $296

• $370

• $424

• $476

A spinner has 5 equally-sized regions (blue, green, red, orange, and yellow). If you spin the spinner 20 times, what is the probability that the spinner lands on blue at most 5 times?

• Approximately 0

• 0.370

• 0.630

• 0.804

• Approximately 1