5. A health spa claims that a new exercise program will reduce a person 's waist size at least 2 centimeters on average over a 5-day period. The waist sizes, in centimeters, of six men who...

Extracted text: 5. A health spa claims that a new exercise program will reduce a person 's waist size at least 2 centimeters on average over a 5-day period. The waist sizes, in centimeters, of six men who participated in this exercise program are recorded before and after the 5-day period in the following table: Man | Waist Size Before 90.4 95.5 98.7 115.9 104.0 85.6 Waist Size After 91.7 93.9 97.4 3. 4. 5n 6. 112.8 101.3 84.0 By computing a 96%confidence interval for the mean reduction in waist size, determine whether the health spa's claim is valid. Assume the distribution of differences in waist sizes before and after the program to be approximately normal.