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Which of the following simple the square root of σ square?

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Which of the following simple the square root of σ square?

(a) Variance

(b) Standard deviation

(c) Mean

(d) Median

This question was addressed to me in an internship interview.

My question is from Distribution topic in chapter Distributions, Graphics & Neural Networks of R Programming

1 Answer

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Right answer is (b) Standard deviation

To explain: Standard deviation is the measure of dispersion of a set of data from its mean. The standard deviation σ is simply the square root of σ square.

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