Getting Started Example 2 for PROC GLMPOWER
/****************************************************************/
/* S A S S A M P L E L I B R A R Y */
/* */
/* NAME: gmpgs2 */
/* TITLE: Getting Started Example 2 for PROC GLMPOWER */
/* (Incorporating Contrasts, Unbalanced Designs, and */
/* Multiple Means Scenarios) */
/* PRODUCT: STAT */
/* SYSTEM: ALL */
/* KEYS: power */
/* power analysis */
/* sample size */
/* general linear models */
/* analysis of variance */
/* PROCS: GLMPOWER */
/* DATA: */
/* */
/* SUPPORT: John Castelloe */
/* REF: */
/* MISC: Graphs produced by ODS Graphics in PROC GLMPOWER */
/* require a style that distinguishes curves based */
/* on a combination of color, line style, and symbol */
/* marker. Styles that are well-suited for use in */
/* PROC GLMPOWER include: STATISTICAL, ANALYSIS, */
/* DEFAULT, LISTING, and HTMLBLUECML. */
/****************************************************************/
data Exemplary;
input Variety $ Exposure $ HeightOrig HeightNew Weight;
datalines;
1 1 14 15 1
1 2 16 16 2
1 3 21 20 2
2 1 10 11 1
2 2 15 14 2
2 3 16 15 2
;
proc glmpower data=Exemplary;
class Variety Exposure;
model HeightOrig HeightNew = Variety | Exposure;
weight Weight;
contrast 'Exposure=1 vs Exposure=3' Exposure 1 0 -1;
power
stddev = 5
ntotal = 60
power = .;
run;