A Researcher Wants to Determine the Efficacy of a Training

question 45

Multiple Choice

A researcher wants to determine the efficacy of a training program directed at improving concentration, focus, and memory on college students.She selects a random sample of 16 individuals and has them take an initial assessment test before the training program.Then the individuals complete the training program, and at the end they take a final test that's comparable to the initial test.The results are shown in the following table: $$\begin{array} { | c | c | c | } \hline \text { Individ. } & \text { Before } & \text { After } \\\hline 1 & 79 & 81 \\\hline 2 & 74 & 73 \\\hline 3 & 81 & 82.5 \\\hline 4 & 75 & 82.5 \\\hline 5 & 72.5 & 85 \\\hline 6 & 75 & 90 \\\hline 7 & 67.5 & 83.5 \\\hline 8 & 57.5 & 72.5 \\\hline 9 & 62.5 & 87.5 \\\hline 10 & 77.5 & 80 \\\hline 11 & 61.5 & 92.5 \\\hline 12 & 57.5 & 80 \\\hline 13 & 61.5 & 71 \\\hline 14 & 72.5 & 84 \\\hline 15 & 64 & 78.5 \\\hline 16 & 71 & 97.5 \\\hline\end{array}$$ The analyst uses a Wilcoxon matched-pairs signed rank test with a 0.05 significance level.The test statistic T_- = ______.

• A)136
• B)142
• C)134
• D)135
• E)152

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Definitions:

Type A Behavior

A personality trait characterized by high levels of competitiveness, self-imposed stress, and a constant sense of urgency.

Coronary Heart Disease

A condition characterized by reduced blood flow to the heart muscle due to the build-up of plaque in the coronary arteries, leading to heart attacks and other heart complications.

Biopsychosocial Approach

Approach to psychopathology that seeks to integrate biological, psychological, and social factors in understanding and treating psychopathology.

Physical Health

The state of one's body, including fitness level, absence of disease, and overall physical condition.