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A 95% Confidence Interval for the Difference in the Population

Question 98

Multiple Choice

A 95% confidence interval for the difference in the population proportions of men (group 1) and women (group 2) who exercise regularly, is [-0.06 to +0.10]. Which of the following is not a reasonable conclusion from this confidence interval?


A) It is plausible that men spend 10% more time exercising, on average, than do women.
B) It is plausible that equal proportions of men and women exercise regularly.
C) It is plausible that the difference in proportions of men and women who exercise regularly is at least 0.05.
D) It is not plausible that the difference in proportions of men and women who exercise regularly is at least 0.15.

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