# Mean of the random variable x calculator

The formula for Mean or Expected Value of a probability distribution is as follows: μ = Σx * P (x) Where, x = Data value P (x) = Probability of value The following are the simple steps to find the

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## Standard deviation calculator (σ)

A Random Variable is a variable whose possible values are numerical outcomes of a random experiment. The Mean (Expected Value) is: μ = Σxp. The Variance is: Var (X) = Σx2p − μ2. The

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## Expected Value Calculator

This online calculator calculates the mean, variance, and standard deviation of random variables entered in the form of a value-probability table. This calculator can help you to calculate basic