A sample of 500 parts from an incoming shipment of parts to the Boeing Renton Plant showed 40 parts to be defective. Our parts contract stipulates an acceptable defective parts rate of 4% to 5%. Construct a 90% confidence interval estimate of the population proportion of parts defective. Interpret you answer. Do you think we have an issue with contract compliance? Explain.

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Business 210
Chapter 9 Confidence Interval Estimate Population Proportion T
A sample of 500 parts from an incoming shipment of parts to the Boeing
Renton Plant showed 40 parts to be defective. Our parts contract stipulates an
acceptable defective parts rate of 4% to 5%. Construct a 90% confidence interval
estimate of the population proportion of parts defective. Interpret you answer.
Do you think we have an issue with contract compliance? Explain.
Transcribed Image Text:Business 210 Chapter 9 Confidence Interval Estimate Population Proportion T A sample of 500 parts from an incoming shipment of parts to the Boeing Renton Plant showed 40 parts to be defective. Our parts contract stipulates an acceptable defective parts rate of 4% to 5%. Construct a 90% confidence interval estimate of the population proportion of parts defective. Interpret you answer. Do you think we have an issue with contract compliance? Explain.
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