Q42 of 46 Page 278

Fill in the blanks

If the variance of a data is 121, then the standard deviation of the data is _______.

11

Explanation: We know the square root of variance is standard deviation, i.e.,


σ2 =121,


taking square root on both sides, we get


σ=√121=11


So, if the variance of a data is 121, then the standard deviation of the data is 11.


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