why would an interaction term change the significance of the main effect variable? why would adding an interaction term to the regression model change the main effect variable from significant to insignificant why does interaction term change the main effect of the main variable what is the interaction term between time and age group? what happens if an interaction becomes insignificant and the main effect is not significant? if interaction term is added to the regression model what does it mean why would adding an interaction term to the regression model change the main affect variable from significant to insignificant? how to change main effect from significant to insignificant which interaction term change the significance of the main effect variable does interaction change the significance of the main effect? quizlet why would a poisson interaction change the main effect in the model? how does the interaction between age groups in poisson be changed why do interactions change the main effects of a regression interaction term change the significance of the main effect variable why does an interaction change the main effect of the regression model? what if interaction changes the main effect? what if interaction is not significant what if interaction in poisson why would an interaction change the main effect variable in poisson regression models which term in poisson regression makes the main effect of the study insignificant?