A compulsive researcher who wants to cover all possibilities might throw in the total score on perceived vulnerability (PVTotal) as well as PVLoss. (The total includes vulnerability to accidents, illness, and life-style related problems.)

a. Run this analysis adding PVTotal to the variables used in Exercise 15.24.

b. What effect did the inclusion of PVTotal have on ? What effect did it have on the standard error of the regression coefficient for PVLoss? If your program will also give you tolerance and VIF, what effect does the inclusion of PVTotal have on them?

c. What would you conclude about the addition of PVTotal to our model?