Why Are Effect Sizes Rather Than Test Statistics Used When

Multiple Choice

Why are effect sizes rather than test statistics used when comparing study results?

A) Effect sizes, unlike test statistics, are not affected by sample size and thus ensure a fair comparison.
B) It is easier to average effect size than it is to average test statistics.
C) Effect sizes are based on standard error, while test statistics are based on standard deviation.
D) Effect sizes, unlike test statistics, account for sample size, thus ensuring an accurate comparison.