How to find the standard deviation of the difference between two means

1.	How to find the standard deviation of the difference between two means?
Answer» The expression for calculating the standard deviation of the difference between two means is given byz = [(x1 - x2) - (µ1- µ2)] / sqrt ( σ1² / n1 + σ2² / n2) Statistical analyses are very often concerned with the difference between means.

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