ADF Test Statistic  0.307094     1%   Critical Value*  -5.8034
      5%   Critical Value  -3.7441
      10% Critical Value  -3.0339
    
*MacKinnon critical values for rejection of hypothesis of a unit root.    
    
    
Augmented Dickey-Fuller Test Equation    
Dependent Variable: D(SER02,2)    
Method: Least Squares    
Date: 04/10/08   Time: 10:46    
Sample(adjusted): 2002 2006    
Included observations: 5 after adjusting endpoints    
    
Variable Coefficient Std. Error t-Statistic Prob. 
    
D(SER02(-1)) 0.306484 0.998014 0.307094 0.7878
D(SER02(-1),2) -0.591080 0.879496 -0.672066 0.5708
C 0.029042 0.038592 0.752535 0.5302
    
R-squared 0.267256     Mean dependent var  0.032400
Adjusted R-squared -0.465489     S.D. dependent var  0.043050
S.E. of regression 0.052115     Akaike info criterion  -2.787012
Sum squared resid 0.005432     Schwarz criterion  -3.021350
Log likelihood 9.967531     F-statistic  0.364733
Durbin-Watson stat 3.211088     Prob(F-statistic)  0.732744
    
这是一阶差分后的结果，算是通过检验了吗，