Q. 33.7( 7 Votes )

Find the mean dev

Answer :

We have, 17, 20, 12, 13, 15, 16, 12, 18, 15, 19, 12, 11


Mean of the given data is




The respective absolute values of the deviations from the mean , i.e. are


2, 5, 3, 2, 0, 1, 3, 3, 0, 4, 3, 4


Thus, the required mean deviation about the mean is




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