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 The independent variable is the variable that is controlled and manipulated by the experimenter. For example, in an experiment on the impact of sleep deprivation on test performance, sleep deprivation would be the independent variable.  The dependent variable is the variable that is measured by the experimenter.