Multiple Choice Questions

What is the coefficient of mean devia shy tion of 21 34 23 39 26 37 40 20 33 27 taken from mean ........

Mathematics (NDA) Statistics

What is the coefficient of mean devia tion of 21, 34, 23, 39, 26, 37, 40, 20, 33, 27 (taken from mean) ?

This questions was previously asked in

2022 NDA -1 Math

0.11

0.22

0.33

0.44

To find the coefficient of mean deviation from the mean, follow these steps:

- Calculate the mean: Add all numbers and divide by 10.

$(21 + 34 + 23 + 39 + 26 + 37 + 40 + 20 + 33 + 27) / 10 = 30$ .

- Find deviations: Calculate the absolute deviation of each number from the mean (30).

Deviations are: 9, 4, 7, 9, 4, 7, 10, 10, 3, 3.

- Mean deviation: Average of these deviations.

$(9 + 4 + 7 + 9 + 4 + 7 + 10 + 10 + 3 + 3) / 10 = 6.6$ .

- Coefficient of Mean Deviation: Divide the mean deviation by the mean.

$6.6 / 30 = 0.22$ .

- Correct Option:

- Option 2: 0.22

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