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Mathematics, 30.03.2020 17:49 naimareiad

A car company claims that their Super Spiffy Sedan averages 31 mpg. You randomly select 8 Super Spiffies from local car dealerships and test their gas mileage under similar conditions. You get the following MPG scores: MPG: 30 28 32 26 33 25 28 30 Does the actual gas mileage for these cars deviate significantly from 31 (alpha = .05)?

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A car company claims that their Super Spiffy Sedan averages 31 mpg. You randomly select 8 Super Spif...
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