Business Statistics

Chapter 15 | Multiple Regression Analysis 561

FIGURE 15.78 (a)

SPSS output exhibiting

regression model by taking

all four explanatory variables

for Example 15.8

FIGURE 15.78(b)

Stepwise regression model

for Example 15.8 produced

using SPSS

BS_CH_15.indd 561 6/20/2009 10:10:55 AM

562 Business Statistics

Figure 15.78(c) exhibits the backward elimination regression model produced us-

ing SPSS for Example 15.8. The process of backward elimination started with all

the four explanatory variables in the model. Marketing expenses with the highest

p