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Question 13 1. A university dean wishes to estimate the average number of hours his part-lime instructors teach per week. The standard deviation is 2.6

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Question 13 1. A university dean wishes to estimate the average number of hours his part-lime instructors teach per week. The standard deviation is 2.6 hours. How large a sample must be selected if he wants to be 95% condent of finding whether the true mean differs from the sample mean by 1 hour? a. 45 2. 13.6 c. 19 d. 26

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