topic Re: Conducting Poisson Regression on data set in SAS Procedures

Conducting Poisson Regression on data set

Andrew1 — Sun, 15 Feb 2015 16:56:35 GMT

Hello!

I'm new to SAS (it's my first time using it; I'm an R user).

I'm interested in conducting a Poisson regression on the following data:

Game Success Attempts 1 4 5 2 5 11 3 5 14 4 5 12 5 2 7 6 7 10 7 6 14 8 9 15 9 4 12 10 1 4 11 13 27 12 5 17 13 6 12 14 9 9 15 7 12 16 3 10 17 8 12 18 1 6 19 18 39 20 3 13 21 10 17 22 1 6 23 3 12

For each game, Y(i) represents the number of free throws made out of n(i) attempts, which are binomial (n(i), pi(i)).

I want to fit the model pi(i) = alpha.

I was able to do this in R showing the value of alpha equal to .42.

I think I can do this using the Proc genmod on the data, as well as a goodness of fit chi-squared test. Additionally I would like to run the maximum likelihood (ML) and quasi-maximum likelihood method (QML) analysis on the dataset.

Re: Conducting Poisson Regression on data set

Community_Help — Sun, 15 Feb 2015 19:15:15 GMT

Hi Andrew, this is logged into the Communities Admin account. I happened to be online and saw your post and that you are a new SAS user. Welcome! It is a bit slower on Sunday here in the community but I'm sure you'll get an answer on Monday if not before. I apologize earlier when your message was caught in our spam filter - that should not happen again.

In the meantime, I did this search in the community - in case there is an answer out there: https://communities.sas.com/search.jspa?view=content&resultTypes=&dateRange=last90days&q=poisson&rankBy=relevance&contentType=all&containerType=&container=&containerName=&userID=&numResults=15

You may also want to check out this blog by , a SAS research and statisitician developer.

ttp://blogs.sas.com/content/iml/author/rickwicklin/ . EspeicallRick is frequently online here in the community especially in: and

You may also want to check out SAS Knowledge Base and Reference and W elcome to Statistics and Operations Research

Thanks,

Lainie

Re: Conducting Poisson Regression on data set

Ksharp — Mon, 16 Feb 2015 07:08:52 GMT

Hi, You should post it at

in: SAS Statistical Procedures

and proc genmod can do Poisson Regression .

Check it :http://support.sas.com/kb/24/188.html

data x;

input Game Success Attempts;

cards;

1 4 5

2 5 11

3 5 14

4 5 12

5 2 7

6 7 10

7 6 14

8 9 15

9 4 12

10 1 4

11 13 27

12 5 17

13 6 12

14 9 9

15 7 12

16 3 10

17 8 12

18 1 6

19 18 39

20 3 13

21 10 17

22 1 6

23 3 12

;

run;

proc genmod data=x;

model success=Attempts/dist=p link=log type1 type3;

run;

data y;

set x;

ln=log(Attempts);

run;

proc genmod data=y;

model success=/ dist=poisson link=log offset=ln;=ln;

run;

Xia Keshan

Message was edited by: xia keshan