11. Subjects with the same values for the explanatory variables will have the same estimated probability of success. 12. All sorts of non-linear functions of the explanatory variables can be fit by the model. 13. They statistically control for the effects of quantitative explanatory variables ( also called covariates or control variables ). 14. The logarithm of the expected value of the response variable is a linear combination of the explanatory variables . 15. A violation of this assumption is perfect multicollinearity, i . e . some explanatory variables are linearly dependent. 16. The relative risk is normally reported as calculated for the mean of the sample values of the explanatory variables . 17. In statistics, "'collinearity "'refers to a linear relationship between two explanatory variables . 18. If the variance increases as levels of income increase, then income may be used as an explanatory variable . 19. In a 2003 paper he explored the use of expected future scarcity as an explanatory variable in current conflicts. 20. In fact, when there are outliers in the explanatory variables , the method has no advantage over least squares.
