Then significance test should be done on the regression equation. The significance test of the regression equation always uses F test by the method of variance analysis. F-statistics is defined as the average of regression sum of squares to the average of error sum of squares ratio. With the given significance level αðα ¼ 0:05Þ and the degree of freedom ðm; nmÞ, we can find Fα ¼ 5:12, checking F distribution table. If j Fj ZFα, it in dicates that this regression has a significant linear. But on the contrary, if j F j oFα, it indicates that this regression does not have a significant linear, namely, all the independent variables are not responding to dependent variables, dramatically