In a Study of the Effectiveness of Physical Exercise in Weight

question 102

Essay

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. $$\begin{array} { l l l l l l l l l l l l l } \text { Before } & 162 & 190 & 188 & 152 & 148 & 127 & 195 & 164 & 175 & 156 & 180 & 136 \\\hline \text { After } & 157 & 194 & 179 & 149 & 135 & 130 & 183 & 168 & 168 & 148 & 170 & 138\end{array}$$

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Definitions:

Training

The process of teaching or learning a particular skill or behavior through practice and instruction over a period.

Team Effectiveness

The degree to which a team achieves its objectives, fulfills the requirements of its members, and sustains its survival and functionality over time.

Common Information Effect

The Common Information Effect is a group dynamic phenomenon where members tend to focus and give more importance to information that everyone in the group knows, rather than unique data held by few.

Explicitly Told

Information or instructions that are conveyed in a direct, clear, and unambiguous manner, leaving no room for misinterpretation or inference.