First slide

Introduction to statistics

Question

The mean deviation of the data 3, 10, 10, 4,7 , 10, 5 from the mean is

Moderate

A

2
B

2.57
C

3
D

3.75

Solution

Given, observations are 3, 10, I0, 4, J , I0 and 5
$∴ \bar{x} = \frac{3 + 10 + 10 + 4 + 7 + 10 + 5}{7} = \frac{49}{7} = 7$
$Now, M.D. = \frac{Σ d_{i}}{N} = \frac{18}{7} = 2.57$

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