The life of an electronic controller is normally distributed, with the parameters µ = 5100h and o=400h. (h= hours) a) What is the probability that a controller will last i) at least 200 DAYS? ii) at least 225 DAYS?
The life of an electronic controller is normally distributed, with the parameters µ = 5100h and o=400h. (h= hours) a) What is the probability that a controller will last i) at least 200 DAYS? ii) at least 225 DAYS?
A First Course in Probability (10th Edition)
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Transcribed Image Text:The life of an electronic controller is normally distributed, with the parameters μ = 5100h and
o = 400h. (h= hours)
a) What is the probability that a controller will last
i) at least 200 DAYS?
ii)
at least 225 DAYS?
b) Repeat part (a) assuming the failures can be estimated to follow Weibull distribution with
B=3.2 and n = 5200 h
i) at least 200 DAYS?
ii) at least 225 DAYS?
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