topic Re: Anocova examples in Statistical Procedures

Anocova examples

Babloo — Fri, 27 Mar 2015 12:57:20 GMT

I was looking for example (or a case study) to implement Anocova technique in my data which holds customer transaction data?

Please someone help me in this regards.

Re: Anocova examples

Doc_Duke — Fri, 27 Mar 2015 19:49:42 GMT

Without more detail to your query, it is had to do much more than point you to the proper procedure and tell you to read the documentation.

ANCOVA is a special case of the General Linear Model. If straightforward, I might first approach it using PROC GLM. If you do a Google search for

ancova site:sas.com

you will find a number of relevant hits that your data might fit into.

If your transaction data has repeats within customer then you might be in the area of mixed models. The Google search I mentioned also includes some references to those.

Re: Anocova examples

Babloo — Sat, 28 Mar 2015 07:38:49 GMT

I read the ANCOVA procedure and was looking to implement with my available data. I searched for the documentation and couldn't figure out the complete one.

May I request you to provide me the link to utilize the example which you want me to look for?

Thanks in advance.

Re: Anocova examples

Doc_Duke — Mon, 30 Mar 2015 14:34:45 GMT

To repeat, "Without more detail to your query, it is had to do much more than point you to the proper procedure and tell you to read the documentation."

Re: Anocova examples

Babloo — Tue, 31 Mar 2015 11:36:29 GMT

How to select the covariate for ANOCOVA? Is that OK if it is continuous and linearly related to the dependent varaible?

Re: Anocova examples

Doc_Duke — Thu, 02 Apr 2015 18:28:51 GMT

The covariates are selected based on the science of the problem. The covariate is expected to be continuous* and it's relationship to the dependent variable is assumed to be linear.

*by the Central Limit Theorem, a binary (0/1 coded) covariate meets the criteria if the sample size is sufficient. For 'how big is big enough', you need to reference some of the linear models textbooks.