A social worker tracked depression levels of clients being treated with cognitive-behavioral therapy for depression. For each client, depression was assessed at weeks 1 to 20 of therapy. She calculated a mean for all of her clients at week 1, week 2, and so on, all the way through to 20.
A) what are the independent and dependent variables?
B) The independent variable is nominal, ordinal or scale?
the dependent variable is nominal, ordinal or scale?
C) which graph or graphs would be most appropriate to depict the data? why?