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Engineers are testing company fleet vehicle fuel economy (miles per gallon) perf

ID: 3126265 • Letter: E

Question

Engineers are testing company fleet vehicle fuel economy (miles per gallon) performance by using different types of fuel. One vehicle of each size is tested. Does this sample provide sufficient evidence to conclude that there is a significant difference in treatment means?

Fill in the boxes. (Round your SS values to 3 decimal places, F values to 2 decimal places and other answers to 4 decimal places.)  

87 Octane 89 Octane 91 Octane Ethanol 5% Ethanol 10% Compact 30.8 30.8 19.5 31.3 27.3 Mid-Size 17.3 18.3 16.9 17.1 31.6 Full-Size 28.9 27.7 15.6 30.2 30.2 SUV 21.8 18.6 20.2 20.2 29.4

Explanation / Answer

sol)

ANOVA Source of Variation SS df MS F P-value F crit Rows 198.5815 3 66.19383 3.66918 0.043829 3.490295 Columns 271.498 4 67.8745 3.76234 0.033072 3.259167 Error 216.486 12 18.0405 Total 686.5655 19