Sample Size Question
If I know my parts have a 30% failure rate, how many parts do I need to inspect to be 95% confident I will find at least one failure? Assuming I made a process improvement and want to see if my failure rate decreased from 30% to 10% w/ 95% confidence, then how many parts do I need to inspect? I think JMP can give me these answers through the DOE>Sample Size Explorer>Power wizard, but I'm not exa...