Dependent Variable: Y
Method: Least Squares
Date: 04/17/16 Time: 08:39
Sample: 1 4
Included observations: 4
VariableCoefficientStd. Errort-StatisticProb.
C60.00000 NA NA NA
N0.200000 NA NA NA
X2.38E-16 NA NA NA
T-0.333333 NA NA NA
R-squared1.000000 Mean dependent var97.50000
S.D. dependent var2.081666 Sum squared resid4.16E-29
Durbin-Watson stat3.035497
这个E是什么 还有后面NA是怎么回事