The gas mileages (in miles per gallon (mpg)) of 10 randomly selected cars, both with and...

 

Transcribed Image Text:

The gas mileages (in miles per gallon (mpg)) of 10 randomly selected cars, both with and without a new gasoline additive, are shown. With Additive Without additive 25.7 24.9 20.0 18.8 28.4 27.7 13.7 13.0 18.8 17.8 12.5 11.3 28.4 27.8 8.1 8.2 23.1 23.1 10.4 9.9 At 5% significance level, is there enough evidence to conclude that the gasoline with additive is more effective in increasing gas mileage? The gas mileages (in miles per gallon (mpg)) of 10 randomly selected cars, both with and without a new gasoline additive, are shown. With Additive Without additive 25.7 24.9 20.0 18.8 28.4 27.7 13.7 13.0 18.8 17.8 12.5 11.3 28.4 27.8 8.1 8.2 23.1 23.1 10.4 9.9 At 5% significance level, is there enough evidence to conclude that the gasoline with additive is more effective in increasing gas mileage?

Answer rating: 100% (QA)

From the given data we have With A Without A dbar 257 249 08 20 188 12 284 277 07 ... View the full answer