In a Study of the Effectiveness of Physical Exercise in Weight

question 78

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. $$\begin{array} { | l l l l l l l l l l l l l | } \hline \text { Before } & 162 & 190 & 188 & 152 & 148 & 127 & 195 & 164 & 175 & 156 & 180 & 136 \\\hline \text { After } & 157 & 194 & 179 & 149 & 135 & 130 & 183 & 168 & 168 & 148 & 170 & 138 \\\hline\end{array}$$ What would be the signed rank for the column with values of 175 and 168?

• A) 10
• B) 8.5
• C) 9
• D) 8

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Definitions:

Unpopular

Lacking in popularity, acceptance, or approval by the majority.

Confrontational

Characterized by or inclined to confront and challenge others directly and aggressively.

Hostile

Displaying or characterized by antagonism or aggression towards others.

Hyperactive

A condition characterized by excessive restlessness and activity, often associated with attention deficit hyperactivity disorder (ADHD).