Question: Group Mean Standard Deviation 87 Octane 22.5750 4 3.5575 89 Octane 25.5500 4 3.2254 91 Octane 25.8000 4 4.2716 Ethanol 5% 22.7500 4 4.5625 Ethanol

Group Mean Standard Deviation 87 Octane 22.5750 4 3.5575 89 Octane 25.5500 4 3.2254 91 Octane 25.8000 4 4.2716 Ethanol 5% 22.7500 4 4.5625 Ethanol 10% 21.8250 4 3.5874 Compact 28.0200 2.0130 Mid-Size 25.4200 2.3392 Full-Size 21.1600 1.4293 SUV 20.2000 2.7911 Total 23.7000 20

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