A Canadian Forces instructor recorded the time in which each of 10 recruits completed an obstacle course both before and after basic training. To test whether any improvement occurred, the instructor would use a t distribution with nine degrees of freedom.

Question

Quizplus · Accepted Answer

The instructor is comparing the times of the same group of individuals before and after training, which is a paired design. Therefore, a paired samples t-test should be used. Since there are 10 individuals, there are 9 degrees of freedom, making a t distribution appropriate for this test.

A Canadian Forces Instructor Recorded the Time in Which Each