Question 2 4 pts TRUE OR FALSE: To compare Model 2 to Model 4 is to test for interaction in the presence of curvature (i.e, with curvature in the model). True False Question 3 4 pts TRUE OR FALSE: Long-term trend may not be an important component of our times series. Equivalently stated: It is possible that we observe a time series variable whose long-term trend value is O for all times. O True False Question 2 4 pts TRUE OR FALSE: To compare Model 2 to Model 4 is to test for interaction in the presence of curvature (i.e, with curvature in the model). True False Question 3 4 pts TRUE OR FALSE: Long-term trend may not be an important component of our times series. Equivalently stated: It is possible that we observe a time series variable whose long-term trend value is O for all times. O True False