The crime is murder in these novels, and the plots include accessories such as floor plans, maps, and railway timetables. The appeal of Golden Age fiction is the challenge of the intellectual game.
exogenous variables. (mathematics). In a mathematical model, the independent variables, which are predetermined and given outside the model. 1  Facebook. 2  Twitter.
I am running a linear regression where the dependent variable is Site Index for a tree species and the explanatory variables are physiographic factors such as elevation, slope, and aspect. None were significant, but after including tree age as independent variable, suddenly elevation and slope become statistically significant.