Let X be a random variable with the following probability distribution. Value X of X 40 50 60 70 P(X=x) 0.25 0.60 0.10 0.05 Complete the following. (If necessary, consult a list of formulas.) (a) Find the expectation E (X) of X. E (X) = [] (b) Find the variance Var(X) of X. Var(x) =

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Author:Amos Gilat
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Let X be a random variable with the following probability distribution.
Value X of X P (X=x)
40
Check
50
60
70
0.25
0.60
0.10
0.05
Complete the following. (If necessary, consult a list of formulas.)
(a) Find the expectation E (X) of X.
E (X) = []
(b) Find the variance Var(X) of X.
Var(x) =
31
RAY
>
Transcribed Image Text:Let X be a random variable with the following probability distribution. Value X of X P (X=x) 40 Check 50 60 70 0.25 0.60 0.10 0.05 Complete the following. (If necessary, consult a list of formulas.) (a) Find the expectation E (X) of X. E (X) = [] (b) Find the variance Var(X) of X. Var(x) = 31 RAY >
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