Question: Try again. The standard deviation, sigma, is the square root of the variance sigma Superscript 2. To calculate the variance of a discrete random variable

Try again. The standard deviation, sigma, is the square root of the variance sigma Superscript 2. To calculate the variance of a discrete random variable X, find the deviation of each data value from the mean and square it. The variance is the expected value of those deviations. To find the standard deviation, use the formulas shown below, where x is a particular value of the discrete random variable X, mu is the mean of X, and P(x) is the probability that X is equal to x. sigma Superscript 2equalsVar(X)equalsUpper Sigma(xminusmu) Superscript 2P(x) sigmaequalsSD(X)equalsStartRoot Var left parenthesis Upper X right parenthesis EndRoot

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