A resarcher in interested in whetehr students who play sports have a higher or lower body mass index (BMI) than students in the general population. The researcher is unsure whether playing sports will...

A resarcher in interested in whetehr students who play sports have a higher or lower body mass index (BMI) than students in the general population. The researcher is unsure whether playing sports will decrease body mass (due to more calories burned) or increases body mass (due to more muscles mass). this is a ______ tailed test and the zcv is ____