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My Notes Ask Your Teacher 5.-12 points 0/3 Submissions Usecd The following is the probability mass function for the number of times a certain computer program will malfunction: p 0.0 028 0.37 0.18 0.09 003 (a) What is the probability that the computer program will malfunction more than 3 times? 12 (b) Compute EO,Ex2), and E-2.07 e-557 Их-11.2851 (c) Suppose Y, the time in minutes to fix malfunctions, relates to the number of times the program malfunctions, by the function: Y-8.x . What is the expected time in minutes needed to fix malfunctions in the program? Minutes (d) What is the variance of the time in minutes to fix the mafunctions? Minutes 2
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Answer #1

(c)

E(Y) = E(8X) = 8E(X) = 8 . 2.07 16.56

(d)

Var(Y) Var(8X) = 64 Var(X) 64 . 1.2851 82.2464

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