Question: Harry Hutchings is the owner of Hutchings Weightlifting Clinic. He claims that by taking a special vitamin, a weightlifter can increase his strength. Ten student athletes are randomly selected and given a test of strength using the standard bench press. After two weeks of regular training, supplemented with the vitamin, they are tested again. The results are shown below.

Weight

Name Before After

Evie Corky 190 196

Bob Mack 250 240

Lou Brandon 345 345

Karl Unger 210 212

Sue Koontz 114 113

Pat O'Leary 126 129

Kim Dennis 186 189

Connie Kaye 116 115

Tom Dama 196 194

Maxine Sims 125 124

At the .01 level of significance, can we conclude the special vitamin increased the strength of the student athletes?