A die is a specialized tool used in manufacturing industries to
cut or shape material mostly using a press. Products made with dies
range from simple paper clips to complex pieces used in advanced
technology.
In a study of a particular wafer inspection process, 399 dies were
examined by an inspection probe and 203 of these passed inspection.
What is the estimated proportion of wafers that passed inspection?
(Round your answers to three decimal places.)
Assuming a stable process, calculate a 95% confidence interval
for the proportion of all dies that pass the probe. (Round your
answers to three decimal places.)
95%CI
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