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  1. L

    34r

    But if I was to use a two sided t-test then I would just find out if there is a difference between these two variables not if depresion in Northern USA is more severe than Southern USA???? what do you think about that.
  2. L

    34r

    Could you explain more why you think we should use two sided t-test? I was thinking that since the student in the question above specifically is looking for if northern USA "have more severe winter depression" than Southern USA our Ho has to be u= 0 and H1: u > 0
  3. L

    34r

    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...