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, 10, 4, 7 ,10 and 5.
$∴ x = \frac{3 + 10 + 10 + 4 + 7 + 10 + 5}{7} = \frac{49}{7} = 7$
Now, $M.D. = \frac{{Σd}_{i}}{N} = \frac{18}{7} = 2 .57$

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