The athletic director at a large university compared the proportions of freshmen (1st year students) and seniors (4th year students) who exercise
regularly. She analyzed the data and found the Z-statistic for the
difference between the population proportions to be 2.43 with a P-value
of 0.015. The level of significance was set at 0.05.
(A) State the conclusion she can draw about the difference between the
two population proportions.