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MCS,PHD
Argosy University/ Phoniex University/
Nov-2005 - Oct-2011
Professor
Phoniex University
Oct-2001 - Nov-2016
Is the amount of money spent by companies on advertising a function of the total sales of the company? Show are sales income and advertising cost data for seven companies published by Advertising Age.
|
 |
Advertising |
Sales |
|
Company |
($ millions) |
($ billions) |
|
Wal-Mart |
1,073 |
351.1 |
|
Procter & Gamble |
4,898 |
68.2 |
|
AT&T |
3,345 |
63.1 |
|
General Motors |
3,296 |
207.3 |
|
Verizon |
2,822 |
93.2 |
|
Ford Motor |
2,577 |
160.1 |
|
Hewlett-Packard |
829 |
91.7 |
Use the data to develop a regression line to predict the amount of advertising by sales. Compute seand r 2. Assuming α = .05, test the slope of the regression line. Comment on the strength of the regression model.
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