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the answer isP=0.0056( mpg's are different at 95% confidence. Please don't post if the answer is different!!!!!!!
(3) A test of the miles per gallon of two different model years of the same car were made with the following results (n is the number of cars of the same model that were tested): Year 1: n=31 Year 2: Is there a significant (at 95% confidence) difference between the mpg of the two models mean 27.30 mpg Std dev-1.41 mpg n=21 mean 28.42 mpg Std dev 1.31 mpg
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Answer: Griden that a test ot the miles per galloon of two diHeenyt model Years of the Same car Null hypoths: 4o Type A Type b X2 28.420 n3-oocoo Pcoled so se () Cnu+2-2) :-879

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