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Let X be a random variable with the following probability distribution. Value x of X P(X=x) -20 0.30 -10 0.15 0.30 10 0.20 20 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) = ]

Let X be a random variable with the following probability distribution. Value x of X P(X=x) -20 0.30 -10 0.15 0.30 10 0.20 20 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) = ]

Calculus For The Life Sciences
Calculus For The Life Sciences
2nd Edition
ISBN:9780321964038
Author:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Publisher:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Chapter13: Probability And Calculus
Section13.3: Special Probability Density Functions
Problem 54E
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Let X be a random variable with the following probability distribution. Value x of X P(X=x) |-20 0.30 -10 0.15 0.30 10 0.20 20 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) = 0
Transcribed Image Text:Let X be a random variable with the following probability distribution. Value x of X P(X=x) |-20 0.30 -10 0.15 0.30 10 0.20 20 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) = 0
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