Question

# Q6/   Let X be a discrete random variable defined by the following probability function x 2...

Q6/

Let X be a discrete random variable defined by the following probability function

 x 2 3 7 9 f(x) 0.15 0.25 0.35 0.25

Give   P(4≤  X < 8)

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Q7/

Let X be a discrete random variable defined by the following probability function

 x 2 3 7 9 f(x) 0.15 0.25 0.35 0.25

Let F(x) be the CDF of X. Give  F(7.5)

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Q8/

Let X be a discrete random variable defined by the following probability function :

 x 2 6 9 13 f(x) 0.25 0.15 0.25 0.35

Give   E(X)

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Q9/ Let X be a discrete random variable defined by the following probability function :

 x 1 5 7 11 f(x) 0.15 0.25 0.35 0.25

Give  Var(X).

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Q10 / (Let X be a discrete random variable with variance Var(X)=3. Find Var(4X +7

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