The result of the inspection conducted the appropriateness of the model shows that the model has a normal distribution, there is no phenomenon of error variance changes and the phenomenon of serial correlation. Since then, the results of the regression model was used for subsequent analysis.
• Inspection of the variance of the error of change: Results showed that the phenomenon does not exist error variance of change means that the remainder of the error variance is not changed.
• Testing of serial correlation (also called autocorrelation): results showed no correlation exists phenomenon known as chain autocorrelation between the residuals of the regression model.
• Inspection of the normal distribution of residuals: the results showed statistically significant, which means accepting the hypothesis Ho is the remainder of a normal distribution model.
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