SOLUTION: How to find E(x^2) in Probability distribution
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Question 752187: How to find E(x^2) in Probability distribution
Answer by reviewermath(1029) (Show Source): You can put this solution on YOUR website!
Q: How to find E(X^2) in Probability distribution
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A: If you know the mean and variance of the random variable X, then use
the equation Var(X) = to solve for .
If you don't know the mean and variance, then use the following formulas:
1. If X is a continuous random variable then = where f(x) represents the probability distribution function of X.
2. If X is a discrete random variable then = , for all values of x, where p(x) represents the probability mass function of X.
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