which term is a quadratic term which term is significant in an interaction model? which term is significant if it is added to the quadratic term what is the difference between interaction and quadratic? what is the purpose of a quadratic interaction term which term is significant in an interaction model? which term of the linear interaction should be included in the model in order to make a linear trend more significant? why is an interaction term significant when an interaction term is added to the model, that term is which is a quadratic interaction term which term is significant? is interaction a quadratic term which of the following terms can be used in isolation to predict a curvilinear trend what term is significant in an interaction model which term is significant which interaction term is significant? are interactions the same as quadratic can you find quadratic or interaction terms in a model why should interaction terms be added which term is significant in terms of interaction in a linear model?