大家好，小妹刚学SAS，用它做时间序列分析，我想问一下有关下面这个表的问题：

Autocorrelation Check for White Noise
To LagChi-SquareDFPr > ChiSqAutocorrelations
619.5260.00340.013-0.0200.0410.040-0.003-0.044
1232.31120.00120.022-0.003-0.0070.0070.0270.050
1847.52180.00020.0160.0010.057-0.001-0.0090.031
2453.99240.0004-0.0100.004-0.0340.0250.0030.005

DF列是什么意思？
Autocorrelations每一行为什么有6个？
还有，SAS的帮助文档中对arima过程的WHITENOISE选项有如下说明，
WHITENOISE=ST | IGNOREMISS specifies the type of test statistic that is used in the white noise test of the series when the series contains missing values. If WHITENOISE=IGNOREMISS, the standard Ljung-Box test statistic is used. If WHITENOISE=ST, a modification of this statistic suggested by Stoffer and Toloi (1992) is used. The default is WHITENOISE=ST.

可是我找不到 Ljung-Box test的结果啊，怎么回事呢？




实在找不到解答，而且急需，所以就来拜托各位了 O(∩_∩)O~