In a Study of the Effectiveness of Physical Exercise in Weight

question 67

Multiple Choice

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 Wilcoxon's signed -ranks test and a significance level of
0) 05 to test the claim that the exercise program has no effect on weight. $$\begin{array} { l l l l l l l l l l l l l } \text { Before } & 162 & 190 & 188 & 152 & 148 & 127 & 195 & 164 & 175 & 156 & 180 & 136 \\\hline \text { After } & 157 & 194 & 179 & 149 & 135 & 130 & 183 & 168 & 168 & 148 & 170 & 138\end{array}$$ What would be the signed rank for the column with values of 175 and 168?

• A) 8
• B) 9
• C) 10
• D) 8.5

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Definitions:

Marginal Cost

The cost of producing one additional unit of a product or service.

Society's Welfare

The overall well-being and quality of life of a community or society, influenced by economic, social, and environmental factors.

Marginal Cost

The cost added by producing one additional unit of a product or service, a critical factor in economic decision-making.

Society's Welfare

The overall well-being and standard of living of the community or society as a whole.