A manufacturer receives parts from two suppliers. An SRS of 400 parts from supplier 1 finds...

 

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A manufacturer receives parts from two suppliers. An SRS of 400 parts from supplier 1 finds 20 defective. An SRS of 100 parts from supplier 2 finds 10 defective. Let p, and p, be the proportion of all parts from suppliers 1 and 2, respectively, that are defective. The standard error needed to compute a 95% confidence interval for p, - p,, the difference in the two proportions is Select one: O a. 0.001. O b. 0.063. O c. 0.032. A manufacturer receives parts from two suppliers. An SRS of 400 parts from supplier 1 finds 20 defective. An SRS of 100 parts from supplier 2 finds 10 defective. Let p, and p, be the proportion of all parts from suppliers 1 and 2, respectively, that are defective. The standard error needed to compute a 95% confidence interval for p, - p,, the difference in the two proportions is Select one: O a. 0.001. O b. 0.063. O c. 0.032.

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