Discussion:
Q: A study is run comparing HDL cholesterol levels between men who exercise regularly and those who do not. The data are shown below.
Regular Exercise = Yes, N = 35,Mean = 48.5, Std Dev = 12.5
Regular Exercise = No, N =120, Mean = 56.9 ,Std Dev = 11.9
Generate a 95% confidence interval for the difference in mean HDL levels between men who exercise regularly and those who do not.