he University of Sydney conducted a survey to find out the average number of hours an academic exercised in a week. They would like to be 95​% confident that the estimated mean is no more than 0.78 hours from the true mean. What sample size should they use. Past data has indicated that the standard deviation for academic exercise time is about 2 hours. a) What sample size should they use?

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he University of Sydney conducted a survey to find out the average number of hours an academic exercised in a week. They would like to be 95​% confident that the estimated mean is no more than 0.78 hours from the true mean. What sample size should they use. Past data has indicated that the standard deviation for academic exercise time is about 2 hours.

a) What sample size should they use?

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