The mean difference is a measure of statistical dispersion equal to the average absolute difference of two independent values drawn from a probability distribution.
x1 - Mean of group one x2 - Mean of group two n - Sample size
There are 2 Group of data which are listed below. Find the mean difference between these groups.
| Group1 | 3 | 2 | 7 | 6 |
| Group2 | 5 | 3 | 9 | 2 |
Mean Differene = (∑ X1 / n) - (∑ X2 / n) ∑ X1 = 3+4+7+6 = 20 ∑ X2 = 5+3+9+2 = 19 m1 =∑ X1 / n = 20 / 4 = 5 m2 =∑ X2 / n = 19 / 4 = 4.75 Mean Differene = 5 - 4.75 = 0.25
