Hello,
I am trying to fi a weibull distribution to a list of frequency data, and I am using the following code in SAS 9.4
proc univariate data=data1;
var group;
freq count;
histogram / weibull (Theta=est) midpoints=1 to 28 by 1;
run;
I got my parameter estimates however SAS did not give me any Goodness of fit statistics. Is there a specific coding that allows me to get one?
Thank you
Yes, the documentation for the GOF tests in PROC UNIVARIATE mentions that the ECDF tests for GOF are only available when c > 2.
I'm not near a copy of Stephens and D'Agostino right now, so I can't look up why that constraint is required.
You code looks correct and should give GOF tables. Run the following and see if you see the "Goodness-of-Fit Tests for Weibull Distribution" table
ods trace on;
proc univariate data=sashelp.cars;
var mpg_city;
freq cylinders;
histogram mpg_city / weibull (Theta=est) midpoints=10 to 60 by 2.5;
run;
ods trace off;
The proposed code did not gice GOF tables unless c>2. I had to put in a value of theta to getW-sq and A-sq GOF statistics.
Is there another procedure available to fit a weibull distribution using point frequency data?
Thank you
Yes, the documentation for the GOF tests in PROC UNIVARIATE mentions that the ECDF tests for GOF are only available when c > 2.
I'm not near a copy of Stephens and D'Agostino right now, so I can't look up why that constraint is required.
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