Validating a model

Modeling and simulation (M&S) can be an important element in the acquisition of systems within government organizations.

M&S is used during development to explore the design trade space and inform design decisions, and in conjunction with testing and analysis to gain confidence that the design implementation is performing as expected, or to assist troubleshooting if it is not.

Therefore, if the residuals appear to behave randomly, it suggests that the model fits the data well.

On the other hand, if non-random structure is evident in the residuals, it is a clear sign that the model fits the data poorly.

"Simulation models are increasingly being used to solve problems and to aid in decision-making.

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If the model fit to the data were correct, the residuals would approximate the random errors that make the relationship between the explanatory variables and the response variable a statistical relationship.

While Java Script does not directly provide constructs for dealing with integers, they can be emulated using two tricks: back to an integer.

As an example of integer arithmetic, addition can be performed by taking two integer values, adding them with the built-in addition operator, and coercing the result back to an integer via the bitwise or operator: This programming model is directly inspired by the techniques pioneered by the Emscripten and Mandreel compilers.

Mozilla's Spider Monkey Java Script engine provides an optimizing implementation of this draft.

, a strict subset of Java Script that can be used as a low-level, efficient target language for compilers.

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