Question: A sample contains 147 pulse rates of randomly selected women. Does it satisfy the requirement that either the population be normally distributed or n>30?

Answer Options: A. The requirement is satisfied because the sample size is greater than 30. B. The requirement is not satisfied because the sample size is less than 30. C. The requirement is not satisfied because the population is not normal. D. The requirement is satisfied because the population is normal.

Answer: A. The requirement is satisfied because the sample size is greater than 30. 14

Question: Using continuity correction, what region corresponds to the probability of fewer than 3 passengers who do not show up for a flight?

Answer Options: A. Area to the right of 3.5 B. Area between 2.5 and 3.5 C. Area to the left of 2.5 D. Area to the right of 2.5 E. Area to the left of 3.5

Answer: C. The area to the left of 2.5 15

Question: In a poll, what do p ^​, q ^​, n, E, and p represent?

Answer Options: For the dropdowns: the margin of error found from evaluating 1− p ^ ​ the population proportion the sample size the sample proportion

Answer: p ^ ​ : the sample proportion q ^ ​ : found from evaluating 1− p ^ ​ n: the sample size E: the margin of error p: the population proportion 16

Question: According to the Rule of Three, if a sample has zero successes, why can’t ordinary confidence-interval methods be used?

Answer Options: A. The requirement of at least 5 successes and at least 5 failures is not satisfied, so the normal distribution cannot be used. B. The requirement of dependent trials is not satisfied, so the binomial distribution cannot be used. C. The requirement of dependent trials is not satisfied, so the normal distribution cannot be used. D. The requirement of at least 5 successes and at least 5 failures is not satisfied, so the binomial distribution cannot be used.

Answer: A. The requirement of at least 5 successes and at least 5 failures is not satisfied, so the normal distribution cannot be used. 17

Question: What are the requirements for constructing a confidence interval estimate of σ or σ 2 ?

Answer Options: A. The sample must be a simple random sample and the population must be normally distributed. B. The population must be normally distributed and the sample size must exceed 30. C. The sample must be a simple random sample. D. The sample must be a simple random sample and the sample size must exceed 30.

Answer: A. The sample must be a simple random sample and the sample must be from a normally distributed population. 18

Question: Which confidence interval is wider: a 99% confidence interval or an 80% confidence interval, and why?

Answer Options: A. The 80% interval is wider because higher confidence requires a wider interval. B. The 80% interval is wider because lower confidence requires a wider interval. C. The 99% interval is wider because lower confidence requires a wider interval. D. The 99% interval is wider because higher confidence requires a wider interval.

Answer: D. The 99% confidence interval is wider because a wider interval is needed to have greater confidence that it captures the true population proportion. 19

Question: For the claim that half of people favor replacing passwords with biometric security, is the hypothesis test two-tailed, left-tailed, or right-tailed?

Answer Options: A. Two-tailed B. Left-tailed C. Right-tailed

Answer: A. Two-tailed 20

Question: For the biometric-security test with H 0​:p=0.50 and P-value 0.5157 at α=0.10, what should be done with the null hypothesis?

Answer Options: Dropdown choices included: Reject Fail to reject

Answer: Fail to reject H 0 ​ . 21

Question: What is the final conclusion for the biometric-security hypothesis test?

Answer Options: Dropdowns form the statement: “There ___ sufficient evidence to ___ the claim that half of us say that we should replace passwords with biometric security.”

Answer: There is not sufficient evidence to warrant rejection of the claim that half of us say that we should replace passwords with biometric security. 22

Question: For the claim that most medical malpractice lawsuits are dropped or dismissed, which hypotheses should be used?

Answer Options: A. H 0 ​ :p=0.5, H 1 ​ :p  =0.5 B. H 0 ​ :p>0.5, H 1 ​ :p=0.5 C. H 0 ​ :p=0.5, H 1 ​ :p<0.5 D. H 0 ​ :p<0.5, H 1 ​ :p=0.5 E. H 0 ​ :p  =0.5, H 1 ​ :p=0.5 F. H 0 ​ :p=0.5, H 1 ​ :p>0.5

Answer: F. H 0 ​ :p=0.5, H 1 ​ :p>0.5 23

Question: Based on the P-value, what conclusion should be made about the claim that quarters made after 1964 have a mean weight equal to 5.670 g?

Answer Options: First dropdown: is not is Second dropdown: warrant rejection of support

Answer: There is not sufficient evidence to warrant rejection of the claim. 24

Question: For the new U.S. Mint process, the P-value is 0.0080 and α=0.10. What should be concluded about the null hypothesis?

Answer Options: A. Fail to accept the null hypothesis. B. Accept the null hypothesis. C. Fail to reject the null hypothesis. D. Reject the null hypothesis.

Answer: D. Reject the null hypothesis. 25