When would a large difference between the means of the control and treatment groups be very likely to be statistically significant?
A) only if the hypothesis is false
B) only if the sample size is large
C) only if the experimental result is practically significant
D) only if the experimental result is not practically significant

Question

Quizplus · Accepted Answer

A large sample size increases the power to detect statistically significant differences between the means of control and treatment groups, even if the effect size is small. Therefore, a large difference between the means of control and treatment groups would be very likely to be statistically significant when the sample size is large, regardless of whether the hypothesis is true or false, or whether the effect size is practically significant or not.

When Would a Large Difference Between the Means of the Control