Problem 5

To learn the effectiveness of an exercise regimen, a physical therapist randomly selects 10 women to participate in a study. She measures their waistlines before a rigorous exercise program and 8 weeks after the program begins and obtains the following data:

Waistline Before23.518.521.5242519.753536.55230

Waistline After19.7519.2521.7522.52519.534.253551.531

Using a level significance of 0.05 , is there enough evidence to show that the waistline decreased after the rigorous exercise program? Use any method.