关于Mpuls中FIML缺失值处理的问题

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大家好！想求助大家：
在用Mplus做分析时显示结果会报告自变量的缺失值无法处理，自变量缺失的case直接删除。在根据看到的教程，将要求模型将自变量的均值进行估计后代码如下：
title: mode10119;
data: file is 60.txt;
vari: names are x1 x2  y1-y6 z1-z6 a1-a16 b1-b16;       
usev = x1 x2 y1 y4 z1 z4 a1-a16 b1-b16;
MISSING =all(999);


analysis:
estimator = MLR;
integration = montecarlo;


model:

y1 on x1(a1);   
y1 on x2(p1);
y1 on z1;
y1 on a1;
y1 on a2;
y1 on a3;
y1 on a4;
y1 on a5;
y1 on a6;
y1 on a7;
y1 on a8;
y1 on a9;
y1 on a10;
y1 on a11;
y1 on a12;
y1 on a13;
y1 on a14;
y1 on a15;
y1 on a16;

[x1 x2  z1  a1-a16];

y4 on x2(a2);   
y4 on x1(p2);
y4 on z4;
y4 on b1;
y4 on b2;
y4 on b3;
y4 on b4;
y4 on b5;
y4 on b6;
y4 on b7;
y4 on b8;
y4 on b9;
y4 on b10;
y4 on b11;
y4 on b12;
y4 on b13;
y4 on b14;
y4 on b15;
y4 on b16;

[x1 x2 z4 b1-b16];

output: SAMPSTAT STANDARDIZED(STDYX) CINTERVAL;

---

这个时候output显示的结果是：
MODEL COMMAND WITH FINAL ESTIMATES USED AS STARTING VALUES

     y1 ON x1*-0.00005 (a1);
     y1 ON x2*-0.00006 (p1);
     y1 ON z1*0.00490;
     y1 ON a1*0.00005;
     y1 ON a2*-0.00101;
     y1 ON a3*-0.00025;
     y1 ON a4*-0.00113;
     y1 ON a5*-0.00006;
     y1 ON a6*0.00065;
     y1 ON a7*0.00040;
     y1 ON a8*-0.00085;

……

     y4 WITH y1*0.00397;
     x2 WITH x1*0.00719;
     z1 WITH x1*-0.00045;
     z1 WITH x2*0.00065;
     z4 WITH x1*-0.00164;
     z4 WITH x2*-0.00320;
     z4 WITH z1*0.00564;
     a1 WITH x1*0.00445;
     a1 WITH x2*0.00427;
……

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我的问题是怎么在使用FIML处理缺失值的同时，是output输出估计值的置信区间？
感谢大家！

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关键词：缺失值处理 FIML 缺失值 Standardized Integration Mplus 缺失值 FIML 置信区间 估计参数