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a week ago - last edited a week ago

Hello,

I am a beginner stat student. I am trying to plot observed and predicted Poisson and negative binomial probabilities against the

data observed. I have no experience or prior knowledge of graphing. I am getting lost in all complex explanations.

Can you please help me in simplest way of accomplishing this task?

Below is my syntax. How do I plot predicted Poisson and negative binomial probabilities against the sample below?

data world;

input scores @@;

datalines;

5 1 6 3 2 1 2 1 1 2 1 3 3 3 3

4 1 1 1 2 1 3 2 2 3 7 3 3 7

4 3 3 3 2 4 2 0 3 3 3 2 4 2

1 1 1 3 7 3 2 2 2 5

;

proc means data=world n mean var;

run;

/* Mean= 2.67 and Variance=2.56. The data is a good canfidate for poisson distribution. */

proc genmod data=world;

model scores= /dist=poisson link=log;

run;

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Solution

Monday

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Posted in reply to Salih

Monday

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Posted in reply to Salih

a week ago - last edited a week ago

Follow the example in the article "Fitting a Poisson distribution to data in SAS."

The only difference is that your response is named 'scores' instead of 'N' and your counts are 0-7 instead of 0-13.

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Posted in reply to Rick_SAS

a week ago

Can you please share the link again? It is not working.

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Posted in reply to Salih

a week ago

Solution

Monday

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Posted in reply to Salih

Monday