Question: Spec >= 320 psi Test method : variable Acceptance criteria 95% Historical data available average = 417.7 S.d = 9.87 Ppk = 3.3 What is

Spec >= 320 psi
Test method : variable
Acceptance criteria 95%
Historical data available
average = 417.7
S.d = 9.87
Ppk = 3.3

What is the defect rate (in percent) that the sampling plan must show the population is less than with high confidence?

What sample size is appropriate given the historical data?

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