It is possible for a very small treatment effect to be a statistically significant treatment effect.

Question

Quizplus · Accepted Answer

Statistically significant means that the effect is unlikely to have occurred by chance. This determination is based on a combination of the size of the treatment effect and the sample size. It is possible for a very small treatment effect to still be statistically significant if the sample size is very large. However, it is important to consider the practical significance or meaningfulness of the effect size in addition to its statistical significance.

It Is Possible for a Very Small Treatment Effect to Be