Calculate the mean deviation for the first data set.The data is already arranged in ascending order.For this data set, n is equal to 5.Also, median, M = 4400MD = n1​ ∑i = 1n​ ∣ di​ ∣,  where  ∣ di​ ∣ = ∣ xi​ − M ∣xi​∣ di​ ∣ = ∣ xi​ − M ∣400040042002004400046002004800400Total1200MD = 51​ × 1200 = 240Therefore, for the income of families in the first group, the mean deviation from the median is Rs 240.Now, consider the second data set. This is also arranged in ascending order.Here,n = 7.Also, median,M= 4400xi∣ di​ ∣ = ∣ xi​ − M ∣300410040004004200200440004600200480040058001400Total6700MD = 71​ × 6700 = 957 . 14Therefore, for the income of families in the second group, the mean deviation from the median is Rs 957.14.