A research firm wants to compare the miles per gallon of unleaded regular, mid-grade, and super premium gasolines. Because of differences in the performance of different automobiles, seven different automobiles were selected and treated as blocks. Therefore, each brand of gasoline was tested with each type of automobile. The results of the trials, in miles per gallon, are shown in the following table. Automobile Gasoline Regular 21 23 24 24 26 26 28 Oa Ob Null hypothesis: a. Ho HR HM HS b. Ho HR HM Hs Mid-grade 23 2544450 22 25 24 26 27 Super Premium Click here for the Excel Data File Required: a-1. Identify the null hypothesis and the alternative hypothesis for gasoline and automobile: 26 25 27 26 30 27 32

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