Test for skewness and kurtosis PreviousNext
Mplus Discussion > Confirmatory Factor Analysis >
Message/Author
 Anonymous posted on Monday, May 16, 2005 - 1:14 pm
I am conducting CFA with continuous latent variables using Mplus version 3.1. I am using ML to estimate missing data. I have tested for univariate skewness and kurtosis of the measured indicators using SPSS (without estimating missing data). However, I am unsure how well the results of SPSS tests generalize to the distribution of the data that includes estimates. Is there a way for me to test for skewness and kurtosis within Mplus using ML estimation for missing data?

Thanks so much for your assistance.

-Elizabeth
 Linda K. Muthen posted on Monday, May 16, 2005 - 1:27 pm
You can use TECH11 of the OUTPUT command. You would need to use TYPE=MIXTURE MISSING BASIC; with CLASSES = c(1); because TECH11 is available only with MIXTURE.
 Anonymous posted on Tuesday, May 17, 2005 - 9:03 am
Thanks for your prompt and informative reply.

-Elizabeth
 Angela Wolff posted on Saturday, April 12, 2008 - 7:49 am
Hi, I am trying to obtain the TECH13 output to asses multivariate skew and kurtosis. I have cateforical variables and identified 1 class.
DATA:
LISTWISE = ON;

VARIABLE:
CLASSES =C(1)
CATEGORICAL ARE ....;
ANALYSIS:
TYPE = MIXTURE;
OUTPUT:
TECH13;

I try different TYPE but keep getting various messages.

When I used TYPE = MIXTURE MISSING BASIC, I received this message....
TECH13 option is not available for MIXTURE MISSING.
Request for TECH13 is ignored.

When I used, TYPE = MIXTURE I received this message (also LISTWISE DELETION IS ON)...
TECH13 option is only available for models with y-variables.
Request for TECH13 is ignored.

Can you assist please in obtaining this output. Thanks
 Linda K. Muthen posted on Saturday, April 12, 2008 - 8:26 am
Please send your input,data, output, and license number to support@statmodel.com.
 Roisin O'Connor posted on Wednesday, May 21, 2008 - 7:55 am
I am trying to test the multivariate normality for a CFA analysis (23 items, 4 factors). I see from the code above that to do this I should use the mixture option and identify one class. When I do this I get the following error:

TECH11 option is not available for single-class models.
Request for TECH11 is ignored.

Any thoughts?
 Roisin O'Connor posted on Wednesday, May 21, 2008 - 9:43 am
To add to my previous question, I should clarify that I want the multivariate normality statistics for data that includes missing values.

Thanks.
 Linda K. Muthen posted on Wednesday, May 21, 2008 - 11:15 am
I think you mean to be using TECH13.

In Version 5, TYPE=MISSING is the default.
 JOEL WONG posted on Thursday, May 09, 2013 - 1:05 pm
I am trying to test for multivariate normality and I got this message:
"TECH13 option is not available for MIXTURE MISSING."

Under variables, I entered
classes = c (1);

and in my model, I indicated
%OVERALL%

I also entered TECH13 under output.

It works fine for TECH12 but not TECH13.

Could you help me figure out the problem?
 Linda K. Muthen posted on Thursday, May 09, 2013 - 1:36 pm
You have the Base program. You need to Base program and the Mixture add-on.
 JOEL WONG posted on Thursday, May 09, 2013 - 1:51 pm
Thanks for responding so quickly.

Based on an old forum post by Bengt, I figured that TECH12 also produces an output to test for multivariate normality.

I could run the output for TECH12 but I am not sure if I understand the output. Do I look at "Observed skewness" and "Observed Kurtosis" to examine multivariate skewness/kurtosis or do these refer to univariate skewness/kurtosis?

Thank you so much.
 Linda K. Muthen posted on Thursday, May 09, 2013 - 2:24 pm
TECH12 is only available for TYPE=MIXTRE.
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