Exhibit 20

question 50

Multiple Choice

Exhibit 20.4.Investment institutions usually have funds with different risk vs.reward prospectuses.A trading magazine wants to determine if the returns of high risk funds is greater than low risk funds.The magazine records the return of high and low risk funds for a sample of 22 institutions.For the Wilcoxon signed-rank test,where D = high risk return - low risk return,the value of the test statistic is . Refer to Exhibit 20.4.Using the p-value approach and ,the appropriate conclusion is:

• A)Reject the null hypothesis,conclude the median difference of the returns is greater than zero
• B)Reject the null hypothesis,cannot conclude the median difference of the returns is greater than zero
• C)Do no reject the null hypothesis,cannot conclude the median difference of the returns is greater than zero
• D)Do not reject the null hypothesis,conclude the median difference of the returns is greater than zero

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Definitions:

Limbic System

A complex system of nerves and networks in the brain, involved in basic emotions such as fear and pleasure, as well as drives like hunger and sex.

Cerebrum

The large mass of the forebrain, which consists of two hemispheres.

Norepinephrine

A neurotransmitter and hormone involved in the body's fight or flight response, influencing mood, arousal, and blood pressure.

Brain Stem

The central trunk of the mammalian brain, responsible for regulating basic life functions like heartbeat and breathing.