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 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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