Statistics

Mathematics (NDA) NDA Exam

Title

45:30

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Indian Economy - Understanding the basics of Indian economic system

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