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.
1 An independent variable (also called a factor) is an explanatory variable manipulated by the experimenter. 2  Each factor has two or more levels (i.e., different values of the factor). 3  Combinations of factor levels are called treatments.