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  Statistical Techniques and 6 Sigma
  How do I calculate the percentage of errors, when I know min, max, mean, cp and CPK

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Author Topic:   How do I calculate the percentage of errors, when I know min, max, mean, cp and CPK
james_t_dk@hotmail.com
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posted 22 March 2001 04:00 AM           Edit/Delete Message   Reply w/Quote
HI

I think I put it all in the subject line.

I have a problem for school. I asked a teacher a problem he couldn't answer, so now I have to find the solution.

I know the following:
CP
CPK
Minimum value
Maximum value
and the mean value.

I need to calculate how many % falls outside min min-max borders!

Can anyone help?

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dWizard
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Posts: 20
From:Normandy, TN 37360
Registered: Mar 2001

posted 22 March 2001 08:57 AM     Click Here to See the Profile for dWizard   Click Here to Email dWizard     Edit/Delete Message   Reply w/Quote
What you need is located here. Specifically, pages 8 through 11. Standard PDF format, so you will need Acrobat Viewer to read it.

Hope this helps.

Regards,
dWizard

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Sam
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Posts: 244
From:
Registered: Sep 1999

posted 22 March 2001 09:01 AM     Click Here to See the Profile for Sam   Click Here to Email Sam     Edit/Delete Message   Reply w/Quote
For a normal distributation:

Zusl= USL - Xdbar/sigma.

Look up Zusl on a "standard normal distributation" table.

Do the same the Zlsl

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james_t_dk
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posted 02 April 2001 03:02 AM           Edit/Delete Message   Reply w/Quote
Thank you very much for your help.

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