To increase power, the easiest variable to control in designing an experiment is usually
A) the difference between the population means.
B) the sample size.
C) the sample standard deviation.
D) the shape of the distribution.

Question

Quizplus · Accepted Answer

Sample size is the easiest variable to control in designing an experiment to increase power. As sample size increases, the standard error of the mean decreases, leading to a greater ability to detect differences between groups or conditions. Increasing sample size also increases the precision of the estimate of the population parameter. The other options (difference between population means, sample standard deviation, and shape of the distribution) are not always under the experimenter's control and may require additional assumptions or adjustments to increase power.

To Increase Power, the Easiest Variable to Control in Designing