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A regression analysis is based on multi collinearity equation examine variables or not. Collinear test, through the Vif index. In theory, the Vif index to be small 10, data to meet the requirements, but in fact, the study of the article, requiring Vif index these two children. Here, all the variables of Vif index can meet the requirements's C was more than 2 hours. This proved independent of multicollinearity among variables. In addition, the SIG index variable is 5% (0.05), that depends on the independent variables used have statistical significance and explanatory variables based on the beta coefficient. In the calibration equation, satisfied customers in the shopping building as tesco:
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