The physical condition of an srs of 12 people is tested after 1

The physical condition of an srs of 12 people is tested after 1

The physical condition of an SRS of 12 people is tested after 1 year’s membership in a health club and is compared to their condition before they joined the club. The trainer at the health club claims that the membership has improved the health of the 12 people. One measure of health is resting pulse rate, with a lower rate generally being better. The data are given in the table below.

 
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