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Sine_Topp
Sine_Topp
Level I

Nelson rules

Dec 13, 2019 07:44 AM (4166 views)

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?

Sine_Topp_0-1576241054410.png

 

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Accepted Solutions
Sine_Topp
Sine_Topp
Level I
Solution

Re: Nelson rules

Dec 19, 2019 03:03 AM (4071 views)  |  Posted in reply to message from cwillden 12-13-2019

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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cwillden
Super User (Alumni) cwillden
Super User (Alumni)

Re: Nelson rules

Dec 13, 2019 11:20 AM (4153 views)  |  Posted in reply to message from Sine_Topp 12-13-2019

Is it possible you have points hidden but not excluded?

-- Cameron Willden
Sine_Topp
Sine_Topp
Level I
Solution

Re: Nelson rules

Dec 19, 2019 03:03 AM (4072 views)  |  Posted in reply to message from cwillden 12-13-2019

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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