One of the Undergraduate Advisors at a State University Wants

One of the undergraduate advisors at a state university wants to estimate the average number of hours freshman business majors at her school spend studying each week. He randomly samples 25 freshman business majors from the freshman business majors attending that semester and measures how many hours each spends studying for a three week period. She then averages the results. The results show a mean of 24 hrs/week and a standard deviation of 4.6 hrs/week.