Unlike the Pp and Ppk calculations which rely on a Normal distribution, the Weibull histogram uses the WEIBULL (or WEIBULL.DIST) function to calculate the Z-scores for the USL/LSL and from these it calculates Pp and Ppk. There is no Cp or Cpk calculation possible in the Weibull Histogram....
Use Stdev to calculate Pp and Ppk, not Cp and Cpk: They had run the QI Macros histogram on two columns of data, one measured at 0 degrees and one measured at 90 degrees. Looking at the histogram you can see that there are two “humps” or distributions. Cp and Cpk are both below ...
1.Calculate ∫ 5x4dx 2.Find ∫x1+2xdx 3.Solve ∫1x2+6x+25dx Related Links Integration by Parts Formula Definite Integral Formula Area under the Curve Formula U Substitution Formula Integration by Substitution Formula Integration Formulas Proofs ...