AP Statistics review

What is the probability that they speak French given that they are a girl? 

• 2.14
• .24
• .4
• .8571

A basket contains four apples and six peaches. You randomly select one piece of fruit and eat it. Then you randomly select another piece of fruit. What is the probability that both pieces of fruit are apples.

• 2/15
• 3/17
• 1/19
• 6/21

What statement does the shaded region represent

• A or B
• Not A
• A and B
• Not B

What percentage of girls have blonde hair?

• 30%
• 32%
• 29%
• 40%

A national health study reported that the proportion of students with elevated blood pressure is 0.15. The principal of a local high school believes that the proportion of students in the school with elevated blood pressure is greater than 0.15. If a large random sample is used, which of the following is the most appropriate test to investigate the principal’s belief?

• A z-test for a proportion

• A z-test for a difference between two proportions

• A chi-square test for homogeneity of proportions

• A t-test for a mean

• A matched-pairs t-test

A medical doctor uses a diagnostic test to determine whether a patient has arthritis. A treatment will be prescribed only if the doctor thinks the patient has arthritis. The situation is similar to using a null and an alternative hypothesis to decide whether to prescribe the treatment. The hypotheses might be stated as follows.

H_o : The patient does not have arthritis

H_a : The patient has arthritis

Which of the following represents a Type II error for the hypotheses?

• Diagnosing arthritis in a patient who has arthritis

• Failing to diagnose arthritis in a patient who has arthritis

• Diagnosing arthritis in a patient who does not have arthritis

• Failing to diagnose arthritis in a patient who does not have arthritis

• Prescribing treatment to a patient regardless of the diagnosis

The American Red Cross says that about 11% of the U.S. population has Type B blood. A blood drive is being held at your school.What is the probability that exactly 2 of the first 20 blood donors have Type B blood? 

• 0.316
• 0.282
• 0.001
• Not here

32 percent of beach goers end up with some form of sunburn on any given day. Find the mean of a survey of 75 beach goers.

• 25

• 24

• 2600

• I don't go to the beach

Tags

CCSS.HSF-LE.A.1B

The probability of winning one of many prizes in a prize draw is 0.05. Ben and Celia each buy a ticket.

What is n for this binomial distribution?

• 0.05

• 0.95

• 2

• 3

The probability of winning one of many prizes in a prize draw is 0.05. Ben and Celia each buy a ticket.

What is p for this binomial distribution?

• 0.05

• 0.95

• 2

• 3