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anonymous
 one year ago
The manufacture of the ColorSmart5000 television set would like to claim 95 percent of its sets last at least five years without needing a single repair. In order to test this claim, a consumer group randomly selects 400 consumers who have owned a colorsmart5000 television set for five years. Of these 400 consumers, 316 say their colorsmart5000 television sets did not need a repair, whereas 84 say their colorsmart5000 television sets did need atleast one repair
anonymous
 one year ago
The manufacture of the ColorSmart5000 television set would like to claim 95 percent of its sets last at least five years without needing a single repair. In order to test this claim, a consumer group randomly selects 400 consumers who have owned a colorsmart5000 television set for five years. Of these 400 consumers, 316 say their colorsmart5000 television sets did not need a repair, whereas 84 say their colorsmart5000 television sets did need atleast one repair

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anonymous
 one year ago
Best ResponseYou've already chosen the best response.0a. Find a 99 percent confident interval for the proportion of all colorsmart5000 television sets that have lasted at least five years without needing a single repair b. Does this confidence interval provide strong evidence that the percentage of colorsmart5000 television sets that last atleast five years without a single repair is less than the 95 percent claimed by the manufacturer? Yes or no? Expain. c. Determine the sample size needed in order to be 99 percent confident that phat, the sample proportion of colorsmart5000 television sets that last atleast five years without a single repair, is within .03 of p, the true proportion of sets that last atleast five years without a single repair
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