Caution must be taken to test the main treatment effect if the interaction is significant. However, there are situations even when the interaction is deemed significant that the test of the treatment effect can make sense. In light of the interaction plot given in the graph , is the test for the main treatment effect brand a meaningful test? Interaction Plot: Brand on X-axis 100 Time 90 0-4 + -4.5 0-5 Kernels LS Means 40 2 Brand