Question: Problem 8.66 In a comparison study of two machines for manufacturing memory chips the following data were collected: Of 500 chips produced by machine 1,

Problem 8.66 In a comparison study of two machines for manufacturing memory chips the following data were collected: Of 500 chips produced by machine 1, 20 were defective; of 600 chips produced by machine 2, 40 were defective. Can you conclude from these results that there is no significant difference (at the level α = 0.05) between the proportions of defective items produced by the respective machines? What is the P-value of your test statistic?

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