An observed difference between two sample groups is more likely to be statistically significant if

Question

Quizplus · Accepted Answer

The amount of variability in each of the sample groups is an important factor in determining statistical significance. If the variability is small, then any observed difference between the groups is more likely to be meaningful and statistically significant. This is because the smaller the variability, the easier it is to detect a difference between the two groups. Thus, choice C is the best answer. Choices A and B are incorrect because a small observed difference and small sample sizes would make it less likely to achieve statistical significance. Choice D is not necessarily true since significant differences can be observed between groups even if they are drawn from different populations.

An Observed Difference Between Two Sample Groups Is More Likely