Question

1) What's the estimated value from the ANOVA regression given by the slopes in Table 4 for the change in sales in the Midwest if ads feature the small labor partition? What's the simple way to get this estimate?

3) What happens to the profile plot in Figure 1 if we reverse the rows and columns of the data?(Let price partition define the x-axis and connect points in the same region). Sketch the new plot. Do you still see the presence of interaction?

Answer 1