An observed difference between two sample groups is more likely to be statistically significant if
A) the observed difference is small.
B) the sample groups are small.
C) the standard deviations of the sample groups are small.
D) both samples are drawn from the same population.

Question

Quizplus · Accepted Answer

A smaller standard deviation means that the data points are closer together and there is less variability within the sample. This increases the chances that any observed difference between the two sample groups is not due to chance and is instead a true difference between the populations being sampled.

An Observed Difference Between Two Sample Groups Is More Likely