Find the difference in the gasolines & automobiles

Reference no: EM1320757

Question: A research firm wants to compare the miles per gallon of unleaded regular, mid-grade, & super premium gasolines. Because of differences in the performance of different automobiles, seven different automobiles were selected & 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. At the .05 significance level, is there a difference in the gasolines & automobiles?

Automobile	Regular	Mid grade	Super Premium
1	21	23	26
2	23	22	25
3	24	25	27
4	24	24	26
5	26	26	30
6	26	24	27
7	28	27	32

Reference no: EM1320757

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