Let X be a random variable with the following probability distribution Value x of X P(X=x) 0. 0.40 0.05 2. 0.15 0.25 4. 0.15 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) = ]

College Algebra (MindTap Course List)
12th Edition
ISBN:9781305652231
Author:R. David Gustafson, Jeff Hughes
Publisher:R. David Gustafson, Jeff Hughes
Chapter8: Sequences, Series, And Probability
Section8.7: Probability
Problem 39E: Assume that the probability that an airplane engine will fail during a torture test is 12and that...
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Let X be a random variable with the following probability distribution
Value x of X P(X=x)
0.
0.40
0.05
2.
0.15
3)
0.25
4
0.15
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) = []
Transcribed Image Text:Let X be a random variable with the following probability distribution Value x of X P(X=x) 0. 0.40 0.05 2. 0.15 3) 0.25 4 0.15 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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