Dependent Variable: Y   
Method: Least Squares   
Date: 04/12/11   Time: 12:32   
Sample: 1 3894   
Included observations: 3893   
   
Variable Coefficient Std. Error t-Statistic Prob.  
   
C 4.498058 0.009844 456.9516 0.0000
X1 0.085204 0.023322 3.653312 0.0003
X2 0.029778 0.013103 2.272689 0.0231
X3 -0.053967 0.007539 -7.158606 0.0000
X4 0.083457 0.014657 5.693808 0.0000
X5 -1.00E-05 1.73E-05 -0.579765 0.5621
X6 0.003664 0.002500 1.465234 0.1429
X7 0.004062 0.004167 0.974839 0.3297
   
R-squared 0.042585     Mean dependent var  4.499445
Adjusted R-squared 0.040860     S.D. dependent var  0.214837
S.E. of regression 0.210402     Akaike info criterion  -0.277536
Sum squared resid 171.9859     Schwarz criterion  -0.264658
Log likelihood 548.2239     F-statistic  24.68582
Durbin-Watson stat 1.061356     Prob(F-statistic)  0.000000
    请高手帮忙看看，虽然x1-x4都已经显著，但是R方较小，有没有什么好的办法？谢谢，请说的详细些