Re: Dummy Coding Variables

Posted by Ryan on Apr 19, 2013; 10:56am
URL: http://spssx-discussion.165.s1.nabble.com/Dummy-Coding-Variables-tp5719548p5719555.html

I did not dare ask what the research question was and how using this variable as an IV would answer it (and what exactly the DV was), so as to avoid going down the "rabbit hole." Are you not following your own advice, David?!?! :-)

 

Ryan

On Fri, Apr 19, 2013 at 6:52 AM, David Marso <[hidden email]> wrote:

Well the 25? 26? level NOMINAL variable has absolutely *no business* being in
the REGRESSION in the first place (so, I will assume you will draw your own
conclusions).  You would do yourself a favor by researching the relationship
between REGRESSION and ANOVA from a linear models perspective and also write
out the regression equation to acquire some sort of epiphany re the
meaning/interpretation of the dummy variables.

JJEcon wrote

> Thanks for your help, Bruce.
>
> As I've already coded the variables (and written about the process), I
> think I'm going to keep them as they are and use the standard regression
> function.
>
> Am I correct in thinking that these 25 dummy variables then replace the 1
> categorical variable in the model and I can now go ahead and run the
> regression? (Sorry- may be a very obvious question)
>
> Thanks again! :)

-----
Please reply to the list and not to my personal email.
Those desiring my consulting or training services please feel free to email me.
---
"Nolite dare sanctum canibus neque mittatis margaritas vestras ante porcos ne forte conculcent eas pedibus suis."
Cum es damnatorum possederunt porcos iens ut salire off sanguinum cliff in abyssum?"
--
View this message in context: http://spssx-discussion.1045642.n5.nabble.com/Dummy-Coding-Variables-tp5719548p5719554.html

Sent from the SPSSX Discussion mailing list archive at Nabble.com.

=====================
To manage your subscription to SPSSX-L, send a message to
[hidden email] (not to SPSSX-L), with no body text except the
command. To leave the list, send the command
SIGNOFF SPSSX-L
For a list of commands to manage subscriptions, send the command
INFO REFCARD