Calculating the Fraction Defective Confidence Interval for a Lot

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glennb185

#1
#1
Can somone suggest a method to calculate the fraction defective confidence interval for a lot given different sample sizes.
 
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Bev D

Bev D

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#3
#3
There are several different formulas for calcualtign the Confidence Intervals dependiing on the nature of your data and what you will use the answer for.

I have attached my spreadsheet for the Normal approximation and the 'exact' Binomial approaches. these are less conservative than the Clopper-Pearson.
 

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