Under What Circumstances Can a Very Small Treatment Effect Still

Multiple Choice

Under what circumstances can a very small treatment effect still be significant?​

A) If the sample size (n) is very large​
B) ​If the sample standard deviation (σ) is very large
C) ​If the standard error of M (σ _M) is very large
D) ​All of the other three factors will result in a significant treatment effect.