1.

The variance of a set of data is 81, find the standard deviation of the data.A. ± 9B. 9C. 81D. 40.51. A2. D3. B4. C

Answer» Correct Answer - Option 3 : B

Given:

Variance = 81

Concept used:

The positive square root of the variance is called Standard deviation

S.D = √Variance

Calculation:

S.D = √Variance

⇒ S.D = √81

⇒ S.D = 9

∴ The standard deviation of the data is 9.



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