Shown below is a Minitab-generated interaction plot representing weights of poplar trees grown at different sites (site 1 and site 2) with different treatments (none, fertilizer, irrigation, fertilizer and irrigation). What does this graph suggest about the interaction between the two factors?

Transcribed Image Text:

MINITAB 1.6 Site 1.4 - 1.2- 1.0- 0.8- 0.6- 0.4- 0.2니 0.0 Treatment Mean