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02-08-2018 01:12 PM

Hello,

We are trying to analyze an open source survey data to find a correlation between categorical dependent and independent variables. We have performed chi square tests to test the null hypotheses and also would like to perform logistic regression to find a correlation between these variables. However, I understand that logistic regression is predictor model, more specifically, binary classifier model which means that it tries to assign exactly one of the 2 classes to every observation and it produces probability with which each observation belongs to each class. It can be more accurately applied to variables which have exactly 2 answers like yes or no; survived or dead; male or female and such observations.

So now, according to our data, this does not hold true as we have many possible answers to the dependent variable like fair, poor, good, very good and excellent. However, we are considering only 2 answers namely poor and fair for our analysis.

Can we use logistic regression for correlation of such a data-set? We have also used Spearman Rank Correlation Coefficient to determine the correlation

Also, is there any way to correlate the 'c value' from the logistic regression and the Spearman Rank Correlation Coefficient?

Any guidance on this is highly appreciated.

Thank you in advance.

-KS.

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02-09-2018
02:38 PM

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Posted in reply to KavitaShah

02-08-2018 01:30 PM

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Posted in reply to KavitaShah

02-08-2018 01:29 PM

There's multinomial logistic regression as well or ordinal logistic regression which are more suited to your question.

If you look at the documentation for PROC LOGISTIC you'll find the example section has some examples. Your best bet is to walk through those examples.

You may also want to consider PLS regression methods.

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Posted in reply to Reeza

02-11-2018 05:11 PM

Thank you for the suggestion.

Solution

02-09-2018
02:38 PM

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Posted in reply to KavitaShah

02-08-2018 01:30 PM

Highlighted
## Re: Logistic regression

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Posted in reply to StatDave_sas

02-09-2018 02:39 PM

Thank you for your inputs. i am working through the suggestions you have given.

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Posted in reply to KavitaShah

02-09-2018 08:01 AM

PROC ADAPTIVEREG and PROC GAMPL also can do logistic regression.

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Posted in reply to Ksharp

02-11-2018 05:12 PM

Sure, thank you.