A research group wishes to estimate the mean number of hours that high school students spend watching TV on a weekday. A margin of error of E=0.15 hour is desired. Past studies suggest that a population standard deviation of σ=2.2 hours is reasonable. Estimate the minimum sample size required to estimate the population mean with 95% confidence. The required sample size is ___?
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We are given the margin of error E = 0.15 hours, the population standard deviation σ = 2.2 hours, and the confidence level of 95%. Show more…
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