The table illustrates that the model result fits the historical power consumption data with an average coefficient of a high multiple determination (R2-value). Testing the model by F-test, a validation for the significance of all regression coefficients, we can draw the conclusion that all factors have remarkable effects on the building power consumption. Using t-test, which represents the significance of a single variable, we can see that the variable DAY of commercial buildings is not significantly correlated with the building power consumption. An acceptable reason is that the influence of weekend is insignificant on the power consumption though customers and sales surge at weekends. So we redo the regression process after eliminating the factor-DAY. The result is presented in Table 3.