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
· x1x1 = Mean of group one
· x2x2 = Mean of group two
· nn = Sample size
There are 2 dance groups whose data is listed below. Find the mean difference between these dance groups.