Suppose that the amount of time teenagers spend playing computer games per week is normally distributed with a standard deviation of 1. 5 hours. A sample of 100 teenagers is selected at random, and the sample mean computed as 6. 5 hours. A. Determine the 95% confidence interval estimate of the population mean. B. Interpret the 95% confidence interval for this situation. C. Determine and interpret the 99% confidence interval estimate of the population mean. D. Determine and interpret the 90% confidence interval estimate of the population mean. E. Determine the 95% confidence interval estimate of the population mean if the sample size is changed to 300. F. Determine the 95% confidence interval estimate of the population mean if the sample size is changed to 36. G. Determine the 95% confidence interval estimate of the population mean if the population standard deviation is changed to 2. H. Determine the 95% confidence interval estimate of the population mean if the population standard deviation is changed to 1. 2. I. Determine the 95% confidence interval estimate of the population mean if the sample mean is changed to 5. 0 hours. J. Determine the 95% confidence interval estimate of the population mean if the sample mean is changed to 8. 5 hours
