Hi all,
I have a question .If I have a 5 sub group to calculate Cpk . I start to test normality in Minitab , result is Nonnormal , However I send this data to test ANAVA and I obtain residuals colump . I brings this to test normality found that residual data are normal distribution . I summarize that data set are normal , so I choose Cpk by normal , however i compare with Cpk , it is differntal . How I will judgement my data is normal or not .
This is serious for me becuase if I have wrong judge normal type . it will affect to Cpk value .
Thank a lot for youe recommend.
I have a question .If I have a 5 sub group to calculate Cpk . I start to test normality in Minitab , result is Nonnormal , However I send this data to test ANAVA and I obtain residuals colump . I brings this to test normality found that residual data are normal distribution . I summarize that data set are normal , so I choose Cpk by normal , however i compare with Cpk , it is differntal . How I will judgement my data is normal or not .
This is serious for me becuase if I have wrong judge normal type . it will affect to Cpk value .
Thank a lot for youe recommend.
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