Question: A production supervisor suspects that a difference exists between the proportions p1 and p2 of defective items produced by two different machines. Experience has shown

A production supervisor suspects that a difference exists between the proportions p1 and p2 of defective items produced by two different machines.

Experience has shown that the proportion defective for each of the two machines is in the neighborhood of .03. If the supervisor wants to estimate the difference in the proportions to within .005, using a 95% confidence interval, how many items must LO5 be randomly sampled from the output produced by each machine? (Assume that the supervisor wants n1 = n2 = n.)

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