Question: LCL , CL , UCL ) = ( 9 0 , 1 1 0 , 1 3 0 ) for a 3 - sigma Xbar
LCL CL UCL for a sigma Xbar chart based on samples of size nine. The process is centered and in control, with DPM falling below the lower specification limit What is the probability that a shift in the mean to will be detected before the fourth sample?
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