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.
The true relationship between the response variable y and the predictor variable x is linear.2. The predictor variable x is non-stochastic and it is measured without any error.3. The model errors are statistically independent.4. The errors are normally distributed with zero mean and a constant standard deviation.