Question
A salesman for a new manufacturer of cellular phones claims not only that they cost the retailer less but also that the percentage of defective
A salesman for a new manufacturer of cellular phones claims not only that they cost the retailer less but also that the percentage of defective cellular phones found among his products, ( p1 p 1 ), will be no higher than the percentage of defectives found in a competitor's line, ( p2 p 2 ). To test this statement, the retailer took a random sample of 210 210 of the salesman's cellular phones and 215 215 of the competitor's cellular phones. The retailer found that 20 20 of the salesman's cellular phones and 7 7 of the competitor's cellular phones were defective. Does the retailer have enough evidence to reject the salesman's claim? Use a significance level of =0.01 = 0.01 for the test. Step 2 of 6 : Find the values of the two sample proportions, p1 p ^ 1 and p2 p ^ 2 . Round your answers to three decimal places.
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