One Way to Increase Power Is to Minimize the Variability

question 44

Multiple Choice

One way to increase power is to minimize the variability of the raw scores.How might this be accomplished?

• A)Change  from 0.05 to 0.01.
• B)Change the size of N from 100 to 25.
• C)Design and conduct the experiment so that all the subjects in a sample are treated in a consistent manner.
• D)Select two very different levels of the independent variable that are likely to produce a relatively large difference between the means.

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Definitions:

Age-Adjusted Death Rates

A statistical measure that allows comparison of mortality rates among different populations by removing the effects of age differences.

Attributable Risk

The difference in the rate of a condition between an exposed population and an unexposed population, which can be attributed to the exposure.

Cohort Study

An observational study design that follows a group of people over time to investigate the causes of disease and establish links between risk factors and health outcomes.

Myocardial Infarction

A medical condition commonly known as a heart attack, which occurs when blood flow to the heart is blocked, causing heart muscle damage.