Mathematics, 08.10.2019 23:20, Samanthacook5626
Samples of 20 parts from a metal punching process are selected every hour. typically, 1% of the parts require rework. let x denote the number of parts in the sample of 20 that require rework. a process problem is suspected if x exceeds its mean by more than 3 standard deviations.
a. if the percentage of parts that require rework remains at 1%, what is the probability that x exceeds its mean by more than 3 standard deviations?
b. if the rework percentage increases to 4%, what is the probability that x exceeds 1?
c. if the rework percentage increases to 4%, what is the probability that x exceeds 1 in at least one of the next five hours of samples?
Answers: 1
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Samples of 20 parts from a metal punching process are selected every hour. typically, 1% of the part...
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