Stress is applied to a 20-in. steel bar that is clamped in afixed position at each end. Let Y 5 the distance from theleft end at which the bar snaps. Suppose Y/20 has a standardbeta distribution with E(Y) 5 10 and V(Y) 5 1007 .a. What are the parameters of the relevant standard betadistribution?b. Compute P(8 # Y # 12).c. Compute the probability that the bar snaps more than2 in. from where you expect it to.

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Chapter1: Combinatorial Analysis
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Stress is applied to a 20-in. steel bar that is clamped in a
fixed position at each end. Let Y 5 the distance from the
left end at which the bar snaps. Suppose Y/20 has a standard
beta distribution with E(Y) 5 10 and V(Y) 5 100
7 .
a. What are the parameters of the relevant standard beta
distribution?
b. Compute P(8 # Y # 12).
c. Compute the probability that the bar snaps more than
2 in. from where you expect it to.

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