topic Bivariate analysis in SAS Procedures

Bivariate analysis

jazzblues24 — Sat, 10 Dec 2011 20:36:04 GMT

What is the best method of conducting a bivariate analysis of two categorical variables? I used proc freq but I wasn't sure what to look for as a result. proc ttest doesn't seem right because I have no results for the Satterthwaite method. Any advice would be great.

Bivariate analysis

art297 — Sat, 10 Dec 2011 21:14:43 GMT

Are your data simply frequencies in an X x Y table? If so, then I'd think that proc frequency's chi square statistic might suffice.

Bivariate analysis

jazzblues24 — Sat, 10 Dec 2011 21:19:56 GMT

yes its in a Yes or No format. Proc freq works out fine. Thanks. Now what if I have a continuous variable vs a categorical variable. I'm thinking proc reg should work?

Bivariate analysis

art297 — Sat, 10 Dec 2011 22:09:39 GMT

I am not a statistician. However, if your dichotomies are all 1 and 0, and your continuous variables are at least interval or interval appearing (e.g., a Likert-type scale), I think you could use either for both.

Bivariate analysis

Ksharp — Mon, 12 Dec 2011 02:16:11 GMT

You can't do it with proc reg because residual is required to conform Normal Distribution.

But for your situation, Logistic Model or proc mixed is a good choice.

Ksharp

Bivariate analysis

art297 — Mon, 12 Dec 2011 05:19:33 GMT

KSharp, Just to make the discussion and possibilities more interesting, here is the start of a chapter from one of Gene Glass's books: http://epm.sagepub.com/content/26/3/623.extract

As I learned, again while not a statistician, one can assume that a dichotomy was forced from a factor that was actually normalliy distributed.

Bivariate analysis

Ksharp — Mon, 12 Dec 2011 06:05:01 GMT

Art.

Yes. dichotomy will conform Normal Distribution, if your sample size is quite large.

Actually Normal Distribution is from bivariate distribution.

Normal Distribution can be deduced by formula of bivariate distribution when N is large enough.

Ksharp