In a Study to Investigate the Effect of Regular Exercise

question 4

Multiple Choice

In a study to investigate the effect of regular exercise on raising HDL (good cholesterol) levels, a random sample of five male subjects known to have low HDL levels had their HDL measured. After six months on a regular exercise schedule, it was measured again. The data are given in the following table. The researcher is interested in testing H₀ : initial and final HDL measurements have the same distribution against the one-sided alternative H_a: final HDL levels are systematically lower. The P-value for the Wilcoxon signed rank test W⁺ is:

• A)0.0281.
• B)0.0329.
• C)0.0495.
• D)0.0694.

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Definitions:

Tax-Deferred

Taxes are paid at the time the money is withdrawn from the account, not when the money is actually earned.

Social Security Benefits

Payments made to eligible individuals (retirees, disabled workers, and their families) from the Social Security program, funded by Social Security taxes.

Need-Based

A criteria or qualification that is determined by the applicant's financial need or income level, often used for financial aid or grants.

Mortality Rate

A measure of the number of deaths in a particular population, scaled to the size of that population, per unit of time.