Business, 07.05.2020 03:58 dominiqueallen23

An engineer designs an improved engine for a certain make of automobile. the previous design had an average highway gas mileage of 30 mpg (miles per gallon). the new engine has an average highway gas mileage of 30.2 mpg, using a sample of 3600 cars of the model with the new engine. although the difference is quite small, the effect is statistically significant. the explanation is

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An engineer designs an improved engine for a certain make of automobile. the previous design had an...

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