A student wants to investigate whether people from northern USA are more severely affected by winter depression ("seasonal affective disorder") than people from southern USA. Using a questionnaire, the research fellow collected data from 20 people from northern USA and 20 people from southern USA.
I think this is a one tail test,
H0: u=0
H1: u > 0
Am I correct?? thank you in advance..
I think this is a one tail test,
H0: u=0
H1: u > 0
Am I correct?? thank you in advance..