Which Change in the Sample Selection Procedure of a Study

question 34

Multiple Choice

Which change in the sample selection procedure of a study involving continuous handrail support,oxygen uptake,and heart rate in women during submaximal step treadmill exercise would have the greatest impact on increasing the generalizability of the results?

• A) Increasing the sample size
• B) Including participants who smoke in the study
• C) Having a true control group rather than having participants serve as their own controls
• D) Expanding the sample population to include equal numbers of women who were moderately fit and highly fit

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Definitions:

Degrees of Freedom

The number of independent values or quantities which can be assigned to a statistical distribution or calculation, essential for determining the preciseness of an estimation or hypothesis test.

Chi-Squared Goodness-Of-Fit Test

A statistical test used to determine if a sample data matches a population with a specific distribution.

More Than Two Categories

A situation or variable that can take on more than two distinct values or classifications.

Reaction Speed

The rate at which a chemical reaction proceeds, often measured in terms of concentration change per unit time.