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* Program: tomato.sas :

* Author: Joshua M. Tebbs :

* Date: 30 October 2005 :

* Example 7.9 (notes) :

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* PROC TTEST is a simple way to perform two-sample t tests

* (pooled or unpooled);

 

options ps=60 ls=80 pageno=1 formdlim='_' nodate;

 

data tomato;

input fert $ yield @@;

cards;

a 26.7 a 17.9 a 21.1 a 15.5 a 18.8

b 28.6 b 25.7 b 29.5 b 19.1 b 19.7 b 24.3

;

 

proc print data=tomato;

title 'yield data from two fertilizers';

run;

 

proc ttest data=tomato;

class fert;

var yield;

title 'hypothesis test for difference in mean yield';

run;