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Control Limits on Non-Normal Distribution

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calpoly

calpoly

Industrial
Joined
Jun 5, 2003
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11
Location
US
Greetings,
I am putting together an X bar-R chart and I want to know if my data is non-normal (did this by plotting z scores and not getting a straight line) does the formula change for the control limits. If so, what is it? Thank you in advance for your help.
 
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