Measurements on the pH values of a chemical compound are taken at random by two operators. Fifteen samples are randomly chosen, with each operator measuring each sample twice. The data are shown in Table 9-10. Specifications on pH are 6.5 ± 0.05. Comment on the capability of the measurement system.
Calculate % gage R&R, precision-to-tolerance ratio, % of process variation, and number of distinct categories and comment on them.
What are the observed process potential and the true process potential? Find a 95% confidence interval for Cp.
