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Q: What do the variance and the standard deviation measure?

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1. Standard deviation is not a measure of variance: it is the square root of the variance.2. The answer depends on better than WHAT!

standard deviation is the square roots of variance, a measure of spread or variability of data . it is given by (variance)^1/2

No. The standard deviation is the square root of the variance.

Square the standard deviation and you will have the variance.

is variance the square of the standard deviation

The variance or standard deviation.

Standard deviation = square root of variance.

Standard deviation is the square root of the variance.

The standard deviation is defined as the square root of the variance, so the variance is the same as the squared standard deviation.

Standard deviation, σ = 13.1 Variance, σ2 = 171.6

Variance isn't directly proportional to standard deviation.

No. Neither the standard deviation nor the variance can ever be negative.

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