There are two competing designs for a certain semiconductor circuit. The lifetime of the first (in hours) is exponentially distributed with 
, and the lifetime of the second is lognormally distributed with ยต = 6 and 
= 5.4.
a. Use a simulated sample of size 1000 to estimate the probability that a circuit with the first design lasts longer than one with the second design.
b. Estimate the probability that a circuit with the first design lasts more than twice as long as one with the second design.
(a) ? 0.84
(b) ? 0.77
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