First create an indicator variable for whether a car has mpg>25:
gen highMPG=mpg>25
Then test whether the subsample with highMPG=1 has a different mean from the subsample with highMPG=0:
ttest weight, by(highMPG)
Last Revised: 12/18/2009
First create an indicator variable for whether a car has mpg>25:
gen highMPG=mpg>25
Then test whether the subsample with highMPG=1 has a different mean from the subsample with highMPG=0:
ttest weight, by(highMPG)
Last Revised: 12/18/2009