In independent random sample of male athletes and male nonathletes at a large university, we find the following samplae characteristics for their GPSs:
Athletes: Mean=2.8, Standard Deviation=0.4, Observations=15
Nonathletes: Mean=2.9, Standard Deviation=0.5, Observations=25
Build a 95% confidence interval for the difference in population menas, assuming that the population variances are equal. Please show work.