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Free statistics help forum. Discuss statistical research, data analysis, statistics homework questions, R, SAS, Stata, SPSS, and more.enMon, 27 Mar 2017 13:43:11 GMTvBulletin60http://www.talkstats.com/images/misc/rss.pngStatistics Help @ Talk Stats Forum
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Negative Binomial Regression - Is this scatterplot okay (pic)?
http://www.talkstats.com/showthread.php/69085-Negative-Binomial-Regression-Is-this-scatterplot-okay-(pic)?goto=newpost
Mon, 27 Mar 2017 13:18:30 GMTHi there,
One assumption of negative-binomial regression is linearity. I have this scatterplot of IV and DV?
Would you say that there is...Hi there,

One assumption of negative-binomial regression is linearity. I have this scatterplot of IV and DV?

Would you say that there is linearity? Is this scatterplot okay?

]]>Regression AnalysisFranziska13http://www.talkstats.com/showthread.php/69085-Negative-Binomial-Regression-Is-this-scatterplot-okay-(pic)Negative Binomial Regression with log-transformed dependent variable possible?
http://www.talkstats.com/showthread.php/69084-Negative-Binomial-Regression-with-log-transformed-dependent-variable-possible?goto=newpost
Mon, 27 Mar 2017 12:10:42 GMTHello,
i have problems with linearity in my negative binomial regression.
The scatterplot shows no linearity between independent and dependent...Hello,

i have problems with linearity in my negative binomial regression.

The scatterplot shows no linearity between independent and dependent variable, it's more like a L-Shape.
When i transform the dependent variable via log, the scatterplot shows linearity.

But can I use a log-transformed dependent variable in my negative binomial regression?
Negative binomial regression is for count variables so i'm not sure.

But what could i do with the linearity problem?

Many thanks in advance and i'm sorry for grammar mistakes (I'm from germany)
]]>Regression AnalysisFranziska13http://www.talkstats.com/showthread.php/69084-Negative-Binomial-Regression-with-log-transformed-dependent-variable-possibleam i overadjusting?
http://www.talkstats.com/showthread.php/69083-am-i-overadjusting?goto=newpost
Mon, 27 Mar 2017 09:56:08 GMTmight sound silly but for my research topic I am looking into insulin resistance (IR) and dietary factors. We are measuring IR by the use of...might sound silly but for my research topic I am looking into insulin resistance (IR) and dietary factors. We are measuring IR by the use of HOMA2IR.., in my model I decided to adjust for diabetes status (normal, prediabetes, diabetes status)... do you think I am overadjusting ? I am asking because diabetes status has a VIF value in spss that is a bit above 3 (less than 4 for sure!) and I know that that might be a collinearity problem.
]]>Biostatisticsjkerr1http://www.talkstats.com/showthread.php/69083-am-i-overadjusting