Under what circumstances can a very small treatment effect be statistically significant?
A)If the sample size is 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

Under what circumstances can a very small treatment effect be statistically significant?​
A)​If the sample size is 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

Quizplus · Accepted Answer

A very small treatment effect can still be statistically significant if the sample size is large enough, as even a small difference may be unlikely to be observed by chance. Additionally, if the sample variance is small, this can further increase the likelihood of finding a significant result.

Under What Circumstances Can a Very Small Treatment Effect Be