2) A 95% confidence interval estimate for a population mean µ is (23, 45). Which of the following is a true statement? (A) There is 0.95 probability that µ is between 23 and 45. (B) If 95% confidence intervals are calculated from all possible samples of the given size, u will be in 95% of these intervals. (C) If 95% confidence intervals are calculated from all possible samples of the given size, 95% of them will be (23, 45). (D) We are 95% confidence that the interval from (23, 45) contains the sample mean (E) The margin of error of this confidence interval is 22.

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2) A 95% confidence interval estimate for a population mean u is (23, 45). Which of the following is a
true statement?
(A) There is 0.95 probability that µ is between 23 and 45.
(B) If 95% confidence intervals are calculated from all possible samples of the given size, µ will be in 95% of
these intervals.
(C) If 95% confidence intervals are calculated from all possible samples of the given size, 95% of them will be
(23, 45).
(D) We are 95% confidence that the interval from (23, 45) contains the sample mean i
(E) The margin of error of this confidence interval is 22.
3) Last year's AP Statistics class contained 25 students. The class got an average of 71 on the final
exam with a sample standard deviation of 4.4. If we assume that this class represents a random sample of all
students who have taken AP Statistics and that final exam scores for the population are normally distributed,
which of the following is the 96% confidence interval for the true population mean of all AP Statistics students?
(A) 71 + 1.9096
(B) 71 + 1.6016
(C) 71 ± 1.804
(D) 71 + 0.9104
(E) 71 + 0.7635
Transcribed Image Text:2) A 95% confidence interval estimate for a population mean u is (23, 45). Which of the following is a true statement? (A) There is 0.95 probability that µ is between 23 and 45. (B) If 95% confidence intervals are calculated from all possible samples of the given size, µ will be in 95% of these intervals. (C) If 95% confidence intervals are calculated from all possible samples of the given size, 95% of them will be (23, 45). (D) We are 95% confidence that the interval from (23, 45) contains the sample mean i (E) The margin of error of this confidence interval is 22. 3) Last year's AP Statistics class contained 25 students. The class got an average of 71 on the final exam with a sample standard deviation of 4.4. If we assume that this class represents a random sample of all students who have taken AP Statistics and that final exam scores for the population are normally distributed, which of the following is the 96% confidence interval for the true population mean of all AP Statistics students? (A) 71 + 1.9096 (B) 71 + 1.6016 (C) 71 ± 1.804 (D) 71 + 0.9104 (E) 71 + 0.7635
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