a. What is the probability that a normal variable exceeds two-sigma limits? (That is, what is the
Question:
a. What is the probability that a normal variable exceeds two-sigma limits? (That is, what is the probability of observing a value of the random variable larger than
2 or less than 2 ?)
b. If “deciding that the process is out of control” means observing a realization of the sample mean exceeding k sigma limits, discuss the advantages and disadvantages of using k 2 versus k 3.
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Related Book For 
Production And Operations Analysis
ISBN: 9781478623069
7th Edition
Authors: Steven Nahmias, Tava Lennon Olsen
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