Question: Three fuel injection systems were tested for efficiency and the following data were obtained: System 1 System 2 System 3 48 60 57 56 56

Three fuel injection systems were tested for efficiency and the following data were obtained:

System 1 System 2 System 3
48 60 57
56 56 55
46 53 52
45 60 50
50 51 21

which pair of injection systems have different efficiencies? (do Tukey'sHonestly Significant Difference Test)

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