For Problem 9.26, estimate the total number of the 2,000 parts in the shipment that are defective, using a 90 percent confidence interval. Problem 9.26 A manufacturer has purchased a batch of 2,000...

For Problem 9.26, estimate the total number of the 2,000 parts in the shipment that are defective, using a 90 percent confidence interval.

Problem 9.26

A manufacturer has purchased a batch of 2,000 small electronic parts from the excess inventory of a large firm. For a random sample of 50 of the parts, five are found to be defective. Estimate the proportion of all the parts in the shipment that are defective, using a 90 percent confidence interval.