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

---

Definitions:

Hyperinflation

An extremely rapid and out of control inflation rate where prices increase exponentially over a short period, severely eroding the real value of money.

Creeping Inflation

A situation in which the inflation rate is low and increases slowly over a period of time.

World War I

A global conflict that lasted from 1914 to 1918, involving many of the world's great powers, marked by military stalemates and massive casualties.

Economic Concern

Issues or situations that affect the well-being of an economy, such as inflation, unemployment, and economic growth.