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In a study of the effectiveness of certain exercises in weight reduction, a group of 10 persons engaged in these exercis...

In a study of the effectiveness of certain exercises in weight reduction, a group of 10 persons engaged in these exercises for one month and showed the following results: Weight before Weight After 211 198 180 173 171 172 214 209 182 179 194 192 160 161 182 182 172 166 155 154 Use a 0.05 level of significance to test the null hypothesis −  =  against the alternative hypothesis −   , and thus judge whether the exercises are effective in weight reduction.

Weight Before Weight After
211 198
180 173
171 172
214 209
182 179
194 192
160 161
182 182
172 166
155 154
0 0
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Answer #1

Heve Jiven dado1 diFfesence befare 3 19 8 0.11 180 173 t71 172 2 09 ) 79 8 1g2. 1 6o 1 82 182 172 166 155 -3.S 172.5 d 4.37801.3844 value PCT ID 上! ere o o, < o.os. - Then thene is suffici em evidence to toeight roduction

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