Question

Find out the mean deviation from the mean and its coefficient from the following data:
class
0-3
3-6
6-9
9-12
12-15
15-18
18-21
f:
2
7
10
12
9
6
4
Use short cut method.
(Ans. I 10.08.M.D.-3.8184. Coeff. of M.D.= 0.3579​

Answer 1

Answer:

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