Which of the following is true when thinking about statistical significance and effect sizes?
A) A statistically significant effect will always have a meaningful effect size.
B) A statistically significant effect will usually have a large effect size.
C) A large effect size is will always be statistically significant.
D) A statistically non-significant effect can have a large effect size.

Question

Quizplus · Accepted Answer

Statistical significance indicates whether or not the results are likely to have occurred by chance, while effect size measures the practical significance or the magnitude of the relationship. It is possible to have a large effect size without statistical significance when the sample size is small or there is a lot of variability within the data. Thus, a statistically non-significant effect can still have a large effect size.

Which of the Following Is True When Thinking About Statistical