interaction

  1. W

    Can you have a significant 3 way interaction without a corresponding 2 way interactio

    Hi all, I have found a signficant 3 way interaction (X by Y by Z) using MANOVA, but do not have any significant 2 way interactions (X by Z -or- Y by Z) involving relevant factors; is this possible? If so, how? Thanks, Drew
  2. D

    testing for the change in correlation between 2 variables over a 3rd linear variable

    I have a hypothesis that the strength of correlation between two continuous variables will decrease with higher levels of a third variable. To give an applied example of the problem, looking at the correlation between mothers weight and their adult child's weight, I expect the correlation to...