cpk VS ppk
Hi,
Why do I get different values of ppk and cpk when my data contains only 1 column - why are the within and overall sigma different?For example - for this data:
98.8
99.7
99.7
99.9
99.5
100
100.4
98.8
99.3
100.5
100.4
100.5
100.2
100.4
101.5
100.7
100.7
100.4
99.7
100.3
100.4
101.2
101.2
100
99.7
100.3
101.4
101
100.5
I get:
Thanks