In a study of the effectiveness of physical exercise in weight reduction, 12 subjects followed a program of physical exercise for two months. Their weights (in pounds)before and after this program are shown in the table. Use a significance level of 0.05 to test the claim that the exercise program has no effect on weight. $$\begin{array} { l l }
\text { Before } & 162&190&188&152&148&127&195&164&175&156&180&136 \
\hline \text { After } & 157&194&179&149&135&130&183&168&168&148&170&138
\end{array}$$

Question

In a study of the effectiveness of physical exercise in weight reduction, 12 subjects followed a program of physical exercise for two months. Their weights (in pounds)before and after this program are shown in the table. Use a significance level of 0.05 to test the claim that the exercise program has no effect on weight. $$\begin{array} { l l } 
\text { Before } & 162&190&188&152&148&127&195&164&175&156&180&136 \
\hline \text { After } & 157&194&179&149&135&130&183&168&168&148&170&138
\end{array}$$

Quizplus · Accepted Answer

The Answer of In a study of the effectiveness of physical exercise in weight reduction, 12 subjects followed a program of physical exercise for two months. Their weights (in pounds)before and after this program are shown in the table. Use a significance level of 0.05 to test the claim that the exercise program has no effect on weight. $$\begin{array} { l l } 
\text { Before } & 162&190&188&152&148&127&195&164&175&156&180&136 \
\hline \text { After } & 157&194&179&149&135&130&183&168&168&148&170&138
\end{array}$$

In a Study of the Effectiveness of Physical Exercise in Weight