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Unformatted text preview: company adopts a new system? C) Compute − of the test and interpret it. D) What would be your conclusion if signi f cance level were 01 instead of 05 ? 1 Problem 2 Weight Watchers claims that those people who use their program lose an average of 46 pounds. A sample of 100 dieters lost an average of 44 pounds, with a standard deviation of 9 pounds. A) Is the Weight Watchers’ claim is supported by the data? Formulate and test the appropriate hypothesis assuming =10%. B) What is the lowest − at which the claim could be rejected? Carefully explain. C) Construct a 99percent con f dence interval for the mean. On the basis of this interval evaluate whether the Weight Watchers’ claim is supported by the data. D) Compare and carefully discuss your answers to A), B) and C). Problem 3 6.54/347. Problem 4 6.72/355 2...
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 Fall '11
 RomanFrydman
 Economics, Null hypothesis, insurance company, Weight Watchers

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