Define and discuss tolerance and the variance inflation factor (VIF)
What will be an ideal response?
Ans: The quantity 1-R_(i.j?i)^2 is referred to as tolerance (tol) in the regression literature. tol is the proportion of variability in variable xi that is not explained by the other predictors, xj?I. The variance inflation factor (VIF) is the reciprocal of tol; that is, VIF = 1/tol. The variance in question is the square of the estimated standard error of bi. As VIF increases the estimated standard error of the regression coefficient on xi increases, and hence estimates of ?i become increasingly imprecise.
You might also like to view...
Explain how regular moderate exercise in middle age affects the nervous and circulatory systems.
What will be an ideal response?
Regular use of hallucinogenics usually
a. leads to physiological dependence. b. causes withdrawal upon quitting. c. does not lead to psychological dependence. d. none of these
For John Holland, the key to being successful and happy in a career is to
A) go where one's talents and abilities lead. B) find an occupation that fits well with one's personality. C) figure out what skills will be needed and valued in the future. D) follow the advice of one's parents, family, and social group.
Greg remembers every detail on Liz's clothing when he first proposed to her. This is an example of ________ memory.
Fill in the blank(s) with the appropriate word(s).