Preliminary agreement of the multiple regression analysis based on the variable must have a normal distribution, the value of each independent variable. Variable must have the same variance at each point of the early variants, and ambiguity from the weather (ε). There is a normal distribution, and is an aberration that occurs by chance (Random) with equal variance of independent variables for every point. Measure the reliability of the estimates from the regression equation, then the measure is measured with 2 views. The standard error of the estimate (Standard error of estimate), and the coefficients of the decision (the Coefficient of Determination R2:) by variable selection methods into the equation. So the equation can be forecast up to variables. How to use a selection procedure (Stepwise Selection).
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