Let X be a random variable, and b be a constant Use the formula Var(X) E (X EX) 2 to find Var(X b), and simplify it to show that Var(X b) Var(X) ...

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Let X be a random variable, and b be a constant. Use the formula Var(X) = E

Question:

Let X be a random variable, and b be a constant. Use the formula Var(X) = E

(X − EX)

to find Var(X +b), and simplify it to show that Var(X +

b) = Var(X).

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