A Canadian Forces drill instructor recorded the time in which each of 15 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 15 degrees of freedom.

Question

Quizplus · Accepted Answer

The instructor would use a t distribution with 14 degrees of freedom because the degrees of freedom for a paired t-test is the number of pairs minus one (n-1), where n is the number of recruits.

A Canadian Forces Drill Instructor Recorded the Time in Which