In a recent study of 35 ninth-grade students, the mean number of hours per week that they played video games was 16.6. The population standard deviation was 120 mins.
(a) Find the value of the best point estimate for population mean.
(b) Find the confidence interval of the mean of the time playing video games.
(c) Find the 99% confidence interval for the same.
(d) Find the Margin of error for each of part (b) and part (c).
(e) Which interval estimate is larger?