11. Find the mean deviation about median for the following data :
Now, N = 50, which is even.
The class interval containing or item is 20-30. Therefore, 20-30 is the median class.
Here, l = 20, C = 14, f = 14, h = 10 and N = 50
Now, we calculate the absolute values of the deviations from median, and
Hence, the mean deviation about the median is 10.34
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