Construct a 90% confidence interval for the population mean, μ. Assume the population has a normal distribution. In a recent study of 22 eighth-graders, the mean number of hours per week that they...

Construct a 90% confidence interval for the population mean, μ. Assume the population has a normal distribution. In a recent study of 22 eighth-graders, the mean number of hours per week that they played video games was 19.6 with a standard deviation of 5.8 hours.