Exercise

The effect of display on sales

To see how much of an effect the DISPLAY actions have on log(SALES) you construct a simple response model for explaining log(SALES) by DISPLAY. The log(SALES) ~ DISPLAY relation is again estimated by the function lm(). Finally, you investigate the coefficients.

Instructions

100 XP

Explain log(SALES) by DISPLAY. Use the function lm() and assign the result to an object called dummy.model.
Obtain the coefficients of the dummy.model by using the function coef().