Question: Need solved A study was conducted in order to estimate u, the mean number of weekly hours that U.S. adults use computers at home. Suppose

Need solved

A study was conducted in order to estimate u, the mean number of weekly hours that U.S. adults use computers at home. Suppose a random sample of 81 U.S. adults gives a mean weekly computer usage time of 8.5 hours and that from prior studies, the population standard deviation is assumed to be o = 3.6 hours. Question 5 of 7 How large a sample of U.S. adults is needed in order to estimate u with a 95% confidence interval of length 1.2 hours? 6 12 20 36 144

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