The Multiple Regression Model Hill et al Chapter 7
A model of the effects of advertising on revenue. 2 = the change in tr ($1000) when p is increased by one unit ($1), and a is held constant
The assumptions of the model
The estimators
Sampling properties
Interval estimates and significance tests
Measuring Goodness of Fit y y x x
Example: Measuring Advertising Effectiveness tr: revenue (thousand $) p: price ($) a: advertising (thousand $) conclusions –demand is elastic –advertising has a positive effect on sales
Interval Estimates and tests of significance t c = 2.01 A 95% interval estimate for 2 is given by
Does advertising break-even?
Goodness of fit