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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 |
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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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