Homework:Week 5 - Assignment

Question 18,8.2.21

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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 =1.8 hours is reasonable. Estimate the minimum sample size required to estimate the population mean with95% confidence.

The required sample size is