The mean deviation from the mean for the set of observations

Answer: Option A : A ¯ x = − 1 + 0 + 4 3 = 1. ∴ Mean Deviation = 1 3 [ | − 1 − 1 | + | 0 − 1 | + | 4 − 1 | ] = 2

Question

The mean deviation from the mean for the set of observations – 1, 0, 4 is

Options:

A . less than 3

B . less than 1

C . greater than 2.5

D . greater than 4.9

Answer: Option A
:
A

¯ x = \frac{- 1 + 0 + 4}{3} = 1. ∴ Mean Deviation = \frac{1}{3} [| - 1 - 1 | + | 0 - 1 | + | 4 - 1 |] = 2

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