Statistics – Means Difference

The mean difference (more correctly, ‘difference in means’) is a standard statistic that measures the absolute difference between the mean value in two groups in a clinical trial. It estimates the amount by which the experimental intervention changes the outcome on average compared with the control.


Mean Difference=∑x1n−∑x2nMean Difference=∑x1n−∑x2n

Where −

·        x1x1 = Mean of group one

·        x2x2 = Mean of group two

·        nn = Sample size


Problem Statement:

There are 2 dance groups whose data is listed below. Find the mean difference between these dance groups.

Group 13957
Group 25344



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