When you have a single sample and want to compute an effect size measure, the most appropriate denominator is
A) the variance of the sample.
B) the standard deviation of the sample.
C) the sample size.
D) none of the above

Question

Quizplus · Accepted Answer

The standard deviation of the sample is the most appropriate denominator when computing effect sizes for a single sample. This is because it allows for standardizing the difference between the sample mean and a comparison mean or a null value. Using the variance of the sample as a denominator may result in an effect size that is difficult to interpret and using the sample size as a denominator does not take into account the variability in the data.

When You Have a Single Sample and Want to Compute