Fitting constant-only model:
Iteration 0:   log likelihood = -443.83224
Iteration 1:   log likelihood = -434.46106
Iteration 2:   log likelihood = -434.28071
Iteration 3:   log likelihood = -434.28062
Iteration 4:   log likelihood = -434.28062
Fitting full model:
Iteration 0:   log likelihood = -376.16864
Iteration 1:   log likelihood = -366.50632
Iteration 2:   log likelihood = -366.46842
Iteration 3:   log likelihood = -366.46841
Interval regression	Number of obs   =	210
	LR chi2(18)     =	135.62
Log likelihood = -366.46841	Prob > chi2     =	0
Coef.   Std. Err.      z	P>z     [95% Conf.	Interval]
area    2.932133   1.528826     1.92	0.055    -.0643104	5.928576
housep   -448.7348   521.3713    -0.86	0.389    -1470.604	573.1342
housel   -386.1795   485.2712    -0.80	0.426    -1337.294	564.9345
houseg    351.7442   509.3611     0.69	0.490    -646.5852	1350.074
ring2    1120.952   180.2664     6.22	0.000     767.6361	1474.267
ring23    855.7064   190.1817     4.50	0.000      482.957	1228.456
ring34    728.4232   175.6007     4.15	0.000     384.2522	1072.594
ring45    583.4251   170.3976     3.42	0.001     249.4519	917.3983
ring56    293.4095   165.9506     1.77	0.077    -31.84764	618.6666
housej    83.86826   213.5533     0.39	0.695    -334.6884	502.4249
housef   -31.00832   183.5519    -0.17	0.866    -390.7634	328.7468
houses    87.40535   134.8948     0.65	0.517    -176.9837	351.7944
houseo    4.321604   340.6107     0.01	0.990    -663.2631	671.9063
housegy   -949.5011   126.2009    -7.52	0.000     -1196.85	-702.152
safety    62.90476     62.887     1.00	0.317     -60.3515	186.161
facility    49.41404   54.26319     0.91	0.362    -56.93985	155.7679
service    35.29336   46.35913     0.76	0.446    -55.56886	126.1556
manage   -.6540509   45.96462    -0.01	0.989    -90.74304	89.43494
_cons    786.0277   547.1169     1.44	0.151    -286.3017	1858.357
/lnsigma    6.458834    .060526   106.71	0.000     6.340206	6.577463
sigma    638.3166   38.63477	566.9128	718.7138
Observation summary:         0     uncensored	observations
33  left-censored	observations
19 right-censored	observations
158       interval	observations

其中的LR CHI2 的值能不能通过检验？ 每个自变量对应的z值怎么判断大小？

还有下面的sigma有什么用？ 

请高手指教！！！

多谢！！！