Question

1. The following measure of dispersion ignores plus or minus signs of deviations
(a)standard deviation (b)mean deviation
(c)quartile deviation (d)all of these​

Answer 1

Answer:

Mean deviation is the arithmetic average of the deviations of the observed values from an  average of the observed values. While calculating mean deviation, mod function is used which makes all the deviations positive. Therefore, it ignores the negative signs of the deviations.

Explanation:

OPTION B IS CORRECT