In a comparison group study using two randomly selected groups, effect size = .24, and p

Question

In a comparison group study using two randomly selected groups, effect size = .24, and p<.01. This means the:
A) difference in means is small and probably due to sampling error
B) difference in means is small but probably is not due to sampling error
C) difference in means is large enough to be important, but may well be due to sampling error
D) difference in means is large and probably not due to sampling error

Quizplus · Accepted Answer

An effect size of .24 is considered small, indicating a small difference in means between the two groups. However, with a p-value of less than .01, this result is statistically significant, suggesting the observed difference is likely not due to chance (or sampling error).

In a Comparison Group Study Using Two Randomly Selected Groups