Question: A health spa calims that a new exercise program will reduce a person's waist size by 2 centimeters on average over a 5-day period. The
A health spa calims that a new exercise program will reduce a person's waist size by 2 centimeters on average over a 5-day period. The waist sizes, in centimeters, of sic men who participated in this exercise program are recorded before and after the 5-day period in the following table:

Man Waist Size Before Waist Size After 90.4 91.7 95.5 93.9 98.7 97.4 115.9 112.8 104.0 101.3 85.6 84.0
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