Variables are values that can change during the program once declared. Oppose to that, Constants, also values once declared, can't change their values.
Chat with our AI personalities
parameters
A number of associated variables are assumed to be constant
Say you want to study the effect of age on income. You would control for other variables that could effect income (for example gender, race etc...). What you are really doing is holding those variables constant so you can see if there actually is a relationship between age and income. Controling makes your findings more powerful and 'true'.
The general form is for a linear equation in n variables is SUM aixi = b (i = 1,2,3,...,n) where xi are the variables and the ai are constant coefficients.
6.