how do i go about doing this practice problem

116. In a class project, D. Rogers obtained 14 concrete cylin- ders produced by students and designed to have a compressive strength of 3,500 psi. He measured the compressive strengths with the following results: 3,423 3,376 3,304 3,601 3,078 3,747 3,603 3,720 3,597 3,794 3,322 3,319 3,497 3,575 Assuming the population of such strengths is normally distrib uted, use this sample to test the hypothesis that the mean com- pressive strength of all such concrete cylinders is 3,500 psi