用sas 做回归分析: dju=bo+b1*a +et ,过程如下:
proc autoreg data=a1;
model dju=a /nlag=1;
run;
请问时间滞后以后的方程怎么写?
结果是: SAS 系统 2009年07月16日 星期四 下午03时37分41秒 32
The AUTOREG Procedure
Dependent Variable dju
dju
Ordinary Least Squares Estimates
SSE 0.03126601 DFE 172
MSE 0.0001818 Root MSE 0.01348
SBC -996.51586 AIC -1002.834
Regress R-Square 0.0379 Total R-Square 0.0379
Durbin-Watson 1.8523
Standard Approx
Variable DF Estimate Error t Value Pr > |t|
Intercept 1 0.000343 0.001033 0.33 0.7400
a 1 0.000495 0.000190 2.60 0.0100
Estimates of Autocorrelations
Lag Covariance Correlation -1 9 8 7 6 5 4 3 2 1 0 1 2 3 4 5 6 7 8 9 1
0 0.000180 1.000000 | |********************|
1 0.000011 0.063262 | |* |
Preliminary MSE 0.000179
Estimates of Autoregressive Parameters
Standard
Lag Coefficient Error t Value
1 -0.063262 0.076319 -0.83
Yule-Walker Estimates
SSE 0.03113818 DFE 171
MSE 0.0001821 Root MSE 0.01349
SBC -992.06561 AIC -1001.5428
Regress R-Square 0.0388 Total R-Square 0.0419
Durbin-Watson 1.9879
Standard Approx
Variable DF Estimate Error t Value Pr > |t|
Intercept 1 0.000339 0.001102 0.31 0.7588
a 1 0.000497 0.000189 2.63 0.0094