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Dave Strouse,
I calculated using Excel (I don't have Minitab), and in my haste, made a mistake that just happened to show the same 98% Bill cited
. Nevertheless, you don't need Minitab to know the process isn't capable! (NOTE: I'm curious about a shape parameter of 16.71? I did a histogram of the data and it looked fairly normal to me. Beta (shape) for normal is around 3.5). 16.71 is pretty wild.
Bill,
A 50% confidence level is nonsense (most tables go no lower than 90%) and only shows that the people presenting the data lack an understanding of the statistical tools they're using.
Steve Prevette made a good common sense reply.
I calculated using Excel (I don't have Minitab), and in my haste, made a mistake that just happened to show the same 98% Bill cited
Bill,
A 50% confidence level is nonsense (most tables go no lower than 90%) and only shows that the people presenting the data lack an understanding of the statistical tools they're using.
Steve Prevette made a good common sense reply.
Thanks again guys. As it happens we are running another sampling next week. I'll keep you posted.