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Q: Given that the variance for a data set is 1.20 what is the standard deviation?

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

No. Variance and standard deviation are dependent on, but calculated irrespective of the data. You do, of course, have to have some variation, otherwise, the variance and standard deviation will be zero.

The standard deviation is the square root of the variance.

Standard deviation is the square root of the variance. Since you stated the variance is 4, the standard deviation is 2.

Standard deviation is the variance from the mean of the data.

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Yes, the variance of a data set is the square of the standard deviation (sigma) of the set. This means that the variance is always a positive number, even though the data might have a negative sigma value.

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The variance is standard deviation squared, or, in other terms, the standard deviation is the square root of the variance. In many cases, this means that the variance is bigger than the standard deviation - but not always, it depends on the specific values.

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Variance = (std dev) ^2 = 36^2 = 1296.

A standard deviation calculator allows the user to find the mean spread away from the mean in a statistical environment. Most users needing to find the standard deviation are in the statistics field. Usually, the data set will be given and must be typed into the calculator. The standard deviation calculator will then give the standard deviation of the data. In order to find the variance of the data, simply square the answer.

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