Examine the accompanying plots. Each is based on hypothetical data from an experiment with a categorical factor A and a continuous covariate X. In each case, indicate which of the main effects and interaction are likely to be present, and which are likely to be weak or absent.

(a)

(b)

(c)

Transcribed Image Text:

Y 4 3 لیا 2 0 -1- -2- -3 0.0 0.2 0.4 X 0.6 A₁ 0.8 1.0 A₂