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Sine_Topp
Level I

Nelson rules

I have made a control chart and activated all the 8 Nelson rules. I get a warning for rule #2, however, I cannot see why. Is there something in my underlying data set that could affect the script?

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Sine_Topp
Level I

Re: Nelson rules

No, I have some data point hidden AND excluded. When I remove them the Nelson warning disappears. They are obviously not excluded from the Nelson rules, though.

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2 REPLIES 2
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cwillden
Super User

Re: Nelson rules

Is it possible you have points hidden but not excluded?

-- Cameron Willden
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Sine_Topp
Level I

Re: Nelson rules

No, I have some data point hidden AND excluded. When I remove them the Nelson warning disappears. They are obviously not excluded from the Nelson rules, though.

View solution in original post

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