One researcher wishes to estimate the mean number of hours that high school students spend watching TV on a weekday. A margin error of 0.28 hour is...

One researcher wishes to estimate the mean number of hours that high school students spend watching TV on a weekday. A margin error of 0.28 hour is desired. Past studies suggest that a population standard deviation of 2.4 hours is reasonable. Estimate the minimum sample size required to estimate the population mean with the stated accuracy.