Selecting and Recruiting Subjects What information does an experimenter need to use a power chart?
A)estimated effect size
B)number of subjects assigned to each treatment condition
C)the dependent variable's fluctuation
D)whether the study uses an independent groups design or matched groups design

Question

Quizplus · Accepted Answer

A power chart is used to determine the sample size needed for a study based on the estimated effect size, type of statistical test being used, desired level of significance, and power. Therefore, an experimenter needs the estimated effect size to use a power chart. The other options listed (B, C, and D) are not necessary for using a power chart.

Selecting and Recruiting Subjects What Information Does an Experimenter Need