Question

If mean absolute deviation is 8, then value of the standard deviation will be:
a.
15
b. 12
c.
10
d. none of the above

Answer 1

Standard Deviation is 10

Explanation:

Relationship between absolute mean deviation and quartile deviation is

MAD=6/5×Q.D

8=6/5×Q.D

:. Q.D.= 6.666

Now, relationship between standard deviation and quartile deviation is

S.D=3/2×Q.D

=3/2×6.666

=10