(Answered) The probability distribution of a discrete random variable

Statistics

The probability distribution of a discrete random variable X is given by:

P(X = -1) = 1/5 ,
P(X = 0) = 2/5 ,
P(X = 1) = 2/5 .

a. Compute E[X].

b. Give the probability distribution of Y = X^2 and compute E[Y ] using the distribution of Y .

c. Determine E[X^2].

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