7) Nielsen media research wishes to estimate the mean number of hours that high school students spend watching TV on a weekday. A margin of error of 0.25 hour is desired. Past studies suggest that a population standard deviation of 1.7 hours is reasonable. Estimate the minimum sample size required to estimate the population mean with the stated accuracy. (5 points) 8) Find the margin of error and sample mean corresponding to this 95% confidence interval: 98.0 < mu < 98.6 (4 points).
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This can be found using a z-table or calculator. The z-score for a 95% confidence interval is 1.96. Show more…
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