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MCS,PHD
Argosy University/ Phoniex University/
Nov-2005 - Oct-2011
Professor
Phoniex University
Oct-2001 - Nov-2016
A process that is considered to be in control measures an ingredient in ounces. Below are the last 10 samples (each of size n = 5 ) taken. The population process standard deviation, σ, is 1.36.

a) What is σx ?
b) If z = 3, what are the control limits for the mean chart?
c) What are the control limits for the range chart?
d) Is the process in control?
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