Statistics Help @ Talk Stats Forum - Regression Analysis
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Linear regression, linear models, nonlinear regressionenSat, 29 Nov 2014 04:37:28 GMTvBulletin60http://www.talkstats.com/images/misc/rss.pngStatistics Help @ Talk Stats Forum - Regression Analysis
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Hedonic regression
http://www.talkstats.com/showthread.php/58647-Hedonic-regression?goto=newpost
Fri, 28 Nov 2014 20:25:02 GMTWhat is the rationale behind hedonic quality index and how to interpret it?
For any example/explanation beside the Wikipedia, I would be very...What is the rationale behind hedonic quality index and how to interpret it?

For any example/explanation beside the Wikipedia, I would be very grateful.
]]>Regression Analysisjohn_fhttp://www.talkstats.com/showthread.php/58647-Hedonic-regressionNewbie question why we use regression ?
http://www.talkstats.com/showthread.php/58636-Newbie-question-why-we-use-regression?goto=newpost
Fri, 28 Nov 2014 03:00:12 GMTHello , Can someone explain to me why we use regression analysis , it will help us in understanding what ? , what we will gain from doing regression...Hello , Can someone explain to me why we use regression analysis , it will help us in understanding what ? , what we will gain from doing regression analysis ? what is regression ?

I know it is quite beginner questions about regression since am not expert in stats but am doing research paper.

I will appreciate the effort given to answer my questions.
]]>Regression Analysishanialbarnihttp://www.talkstats.com/showthread.php/58636-Newbie-question-why-we-use-regressionWhat is the “pdm” stat in the “rms” R package?
http://www.talkstats.com/showthread.php/58635-What-is-the-“pdm”-stat-in-the-“rms”-R-package?goto=newpost
Fri, 28 Nov 2014 00:17:16 GMTI am new to the world of Regression in statistics and I have been doing a research in which I am building an ordinal logistic regression model (ORM)....I am new to the world of Regression in statistics and I have been doing a research in which I am building an ordinal logistic regression model (ORM). In order to fit my ORM model, I am using the 'orm' function of the 'rms' package from R (http://cran.r-project.org/web/packages/rms/rms.pdf).

Now I am trying to assess the goodness of fit of my model. By reading the R documentation, I can see the following statement in the 'stat' property of the 'orm' object (pg.98):

"(...)Nagelkerke R2 index, the g-index, gr (the g-index on the odds ratio scale), and pdm (the mean absolute difference between 0.5 and the predicted probability that Y >= the marginal median)(...)."

I don't have enough background to understand the short description of the pdm measure. But when I try to do more research on this measure, I am not able to find related material (e.g. I've been finding "prescription drug misuse"). In summary, my question is:

Would you know if the 'pdm' measure has some synonym which is more widely used? Or can you provide some references where I can study the pdm metric?
]]>Regression Analysisdanielalencarhttp://www.talkstats.com/showthread.php/58635-What-is-the-“pdm”-stat-in-the-“rms”-R-package