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A B C D E F G H H Population 1 Population 2 2 24.2 23.0 3 26.1 21.7 4 28.8 32.7 5 30.1 20.7

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A B C D E F G H H Population 1 Population 2 2 24.2 23.0 3 26.1 21.7 4 28.8 32.7 5 30.1 20.7 Population 1 drove Nissan Maximas with the air 6 24.6 31.1 conditioning on and Population 2 drove Nissan 29.1 19.6 Maximas with the air conditioning off. The values are 8 28.2 26.5 their MPGs. 9 27.4 21.1 10 28.3 20.6 11 27.9 27.2 12 26.8 13 14Question 18 In the hypothesis test for equality of mean fuel economy (mpg) using an alpha of .05 you reject the null hypothesis of equal means. 0 True 0 False Question 1 9 You are going to test the null hypothesis that the mean fuel economy for population 'I is greater than or equal to the mean for population 2 . What is the test statistic? Do not assume that the population variances are equal. Recommendation: do this in excel and then using the summary values (sample means, sample variance, and sample sizes) check that the value is correct using a hand held calculator. E

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