In a study of the effectiveness of certain exercises in weight reduction, a groupof 10 persons...

In a study of the effectiveness of certain exercises in weight reduction, a groupof 10 persons engaged in these exercises for one month and showed the following results:

weight before weight after

214 209

182 179

194 192

160 161

182 182

172 166

155 154

185 181

167 164

203 201

a) Use a hypothesis test with the 0.05 level of significance to judge whether the exercises are effective in weight reduction. In carrying out your test, be sure to state your null and alternative hypothesis, compute the test statistic and state your conclusions, both in terms of the hypotheses and in terms of the problem.

b) specify the assumption you used in part (a)

Solutions

Expert Solution

Let us denote the difference

d = weight before - weight after

There is sufficient evidence to support the claim that the exercises are effective in weight reduction.

orchestra answered 1 year ago

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