2. A university dean wishes to estimate the average number of hours his part-time instructors teach per week. The standard deviation from a previous study is 2.6 hours. How large a sample must be selected if he wants to be 99% confident of finding whether the true mean differs from the sample mean by 1 hour?

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Q: Maximi

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Q: The ages of twenty husbands and wives arc given in Tabfe 9.8. Form a two-way frequency table showing...

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