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.

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Quizplus · Accepted Answer

A very small treatment effect can still be significant if the sample size is very large. A large sample size reduces the standard error, making it easier to detect a significant effect even if the effect size is small.

Under What Circumstances Can a Very Small Treatment Effect Still