Question: As sample size increases in the treatment and control groups of a study, what effect will that have on the size of the standard error

As sample size increases in the treatment and control groups of a study, what effect will that have on the size of the standard error of the difference between the means?

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. As sample size increases in the treatment and control groups of a study, what effect will that have on the size of the standard error of the difference between the means?

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