Pareto chart - graphically display the frequency of certain variables
Pareto chart - the classic 80/20 rule. For example, 20 percent of the transactions account for 80% of the value, etc. Postulated by the Italian Statistician Pareto.
Proc Pareto Syntax
proc pareto data=DATAFILE;
var VARIABLENAME;
out = OUTPUTRESULT;
by BYVAR;
Proc Pareto Parameters Used
There are four parameters for the Pareto procedure:
DATAFILE - the datafile to be analyzed
VARIABLENAME - the numeric variable to be analyzed
OUTPUTRESULT - name of the file to store the results of the analysis
BYVAR - the sort sequence variable name
Proc Pareto Example Script
/*
amount distribution - produce pareto chart
pareto1.ezs
*/;
* pareto chart procedure to identify distributions;
libname test 'c:\ezs\output';
libname bls 'c:\ezs\tab\bls';
libname par 'c:\ezs\tab\pareto';
proc pareto data=bls.cewenb;
var own;
by area;
out=par.bls;
run;
Conclusions from Example Data
The example above shows that the three types DDD, AA and CC comprise over 80% of the population.
The Pareto Chart procedure is part of EZ-R Stats for Windows.
Analysts interested in the Pareto Chart procedure may also be interested in Proc Means and Proc Outlier.