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If the variance of the population of a town is 81 then find the standard deviation of the data.

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If the variance of the population of a town is 81 then find the standard deviation of the data.
1. 9
2. 7
3. 10
4. 3
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Correct Answer - Option 1 : 9

Given:

Variance = 81

Concept used:

Standard deviation = (Variation)1/2

Calculation:

Standard deviation = √81

⇒ 9

∴ Standard deviation of the data is 9

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