Leisure-Time Physical Activity Levels Increased Slightly in Recent Years

question 49

True/False

Leisure-time physical activity levels increased slightly in recent years.

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Definitions:

Sample Variance

The measure of dispersion of sample data points around the sample mean, providing an estimation of the population variance.

Sample Standard Deviation

A measure of the dispersion or variability of a set of sample data points around its mean.

Empirical Rule

The Empirical Rule, also known as the 68-95-99.7 rule, states that for a normal distribution, roughly 68% of data falls within one standard deviation of the mean, 95% within two standard deviations, and 99.7% within three standard deviations.

Coefficient of Variation

A statistical measure that shows the dispersion of data points or distribution relative to the mean, usually expressed as a percentage.