A discrete random variable X is defined by the following probability distribution X 2 7 9...
A discrete random variable X is defined by the following probability distribution
| X | 2 | 7 | 9 | 10 |
|---|---|---|---|---|
| P ( X = x ) | 0.08 | 0.12 | 0.38 | 0.42 |
Find the following :
-
μ = E ( X )
-
E(X^2) .
-
E ( 2X + 3 )
-
E ( 4X − 8 )
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σ ^2 = Var ( X )
-
σ = SD ( X )
Homework Answers
TOPIC:Discrete random variable and Expected values,variance and sd.
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