Analysis: A. Incorrect. All of these choices are true. B. Incorrect. All of these choices are true. C. Incorrect. All of these choices are true. D. Correct. All of these choices are true. ANSWER: D Ref: Section 11.1 Under what condition(s) does the test statistic for have an approximate normal distribution? p When > 5. np When and are both > 5. np np(1-p) When > 30. n When and are both > 5. np n(1-p) Analysis: A. Incorrect. When and are both > 5 np n(1-p) B. Incorrect. When and are both > 5 np n(1-p) C. Incorrect. When and are both > 5 np n(1-p) D. Correct. When and are both > 5 np n(1-p) ANSWER: D Ref: Section 11.2 - 11.3 In selecting the sample size to estimate the population proportion if we have no knowledge p, of even the approximate values of the sample proportion, we: take another sample and estimate. take two more samples and find the average of their. let =0.50. let =0.95. Analysis: A. Incorrect. We let =0.50 if we have no knowledge of even the approximate values. B. Incorrect. We let =0.50 if we have no knowledge of even the approximate values. C. Correct. We let =0.50 if we have no knowledge of even the approximate values. D. Incorrect. We let =0.50 if we have no knowledge of even the approximate values. ANSWER: C Ref: Section 11.2 - 11.3 The use of the standard normal distribution for constructing confidence interval estimate for the population proportion requires: p and ) both greater than 5. and both greater than 5. np n(1-p) and both greater than 5. n(1+) n(1-) sample size greater than 5. Analysis:
Analysis: A. Incorrect. All of these choices are true. B. Incorrect. All of these choices are true. C. Incorrect. All of these choices are true. D. Correct. All of these choices are true. ANSWER: D Ref: Section 11.1 Under what condition(s) does the test statistic for p have an approximate normal distribution? When np > 5. When np and np(1-p) are both > 5. When n > 30. When np and n(1-p) are both > 5. Analysis: A. Incorrect. When np and n(1-p) are both > 5 B. Incorrect. When np and n(1-p) are both > 5 C. Incorrect. When np and n(1-p) are both > 5 D. Correct. When np and n(1-p) are both > 5 ANSWER: D Ref: Section 11.2 - 11.3 In selecting the sample size to estimate the population proportion p, if we have no knowledge of even the approximate values of the sample proportion, we: take another sample and estimate. take two more samples and find the average of their. let =0.50. let =0.95. Analysis: A. Incorrect. We let =0.50 if we have no knowledge of even the approximate values. B. Incorrect. We let =0.50 if we have no knowledge of even the approximate values. C. Correct. We let =0.50 if we have no knowledge of even the approximate values. D. Incorrect. We let =0.50 if we have no knowledge of even the approximate values. ANSWER: C Ref: Section 11.2 - 11.3 The use of the standard normal distribution for constructing confidence interval estimate for the population proportion p requires: and ) both greater than 5. np and n(1-p) both greater than 5. n(1+) and n(1-) both greater than 5. sample size greater than 5. Analysis: