signrank

  1. M

    Ordinal variable difference between pre and post- age IV

    I have a self-efficacy scale ordinal 1 to 5. I ask this question in pre and post tests. I would like to know if age affect the change in self-efficacy between pre and post. My attempt was to gen efficacy _change= efficacy_post - efficacy_pre. and the just regress efficacy _change age Is...