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 Standard Deviation is: σ = √Var(X).
measure of spread for a distribution of a random variable that determines the degree to which the values differ from the expected value. The standard deviation of random variable X is often written as σ or σX.
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Answer:
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 Standard Deviation is: σ = √Var(X).
measure of spread for a distribution of a random variable that determines the degree to which the values differ from the expected value. The standard deviation of random variable X is often written as σ or σX.