Under what circumstances can a very small treatment effect be statistically significant?
A)If the sample size big and the sample variance is small
B)If the sample size and the sample variance are both big
C)If the sample size is small and the sample variance is big
D)If the sample size and the sample variance are both small

Question

Quizplus · Accepted Answer

A very small treatment effect can be statistically significant if the sample size is big and the sample variance is small. This is because with a large sample size, even small differences can be detected and a small sample variance reduces the variability in the data, making it easier to detect statistically significant differences.

Under What Circumstances Can a Very Small Treatment Effect Be