Which Nutritional Supplement Has an Antioxidant Effect and May Protect

question 93

Multiple Choice

Which nutritional supplement has an antioxidant effect and may protect against age-related declines in cognitive functions?

• A) calcium
• B) vitamin E
• C) catechin
• D) vitamin A

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Definitions:

F-test

A statistical test used to determine if there are significant differences between the variances of two or more groups.

Rejection Region

Rejection region is the range of values in hypothesis testing that leads to the rejection of the null hypothesis if the test statistic falls within this range.

F-test

A statistical test that compares the variances of two populations to ascertain if they come from distributions with equal variances.

Mean Square Error (MSE)

MSE is a measure of the quality of an estimator—it is always non-negative, and values closer to zero are better. It is the average of the squares of the errors or deviations—that is, the difference between the estimator and what is estimated.