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A Quality Control Expert Wants to Estimate the Proportion of Defective

Question 35

Short Answer

A quality control expert wants to estimate the proportion of defective components that are being
manufactured by his company to within 2.5%.A sample of 300 components showed that 20 were
defective.How large a sample is needed to estimate the true proportion of defective components with
99% confidence? (Using the text z-table value)

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