Getting Started Example 2 for PROC POWER
/****************************************************************/
/* S A S S A M P L E L I B R A R Y */
/* */
/* NAME: pwrgs2 */
/* TITLE: Getting Started Example 2 for PROC POWER */
/* (Determining Required Sample Size for a Two-Sample */
/* t Test) */
/* PRODUCT: STAT */
/* SYSTEM: ALL */
/* KEYS: power */
/* power analysis */
/* PROCS: POWER */
/* DATA: */
/* */
/* SUPPORT: John Castelloe */
/* REF: */
/* MISC: Graphs produced by ODS Graphics in PROC POWER */
/* 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 POWER include: STATISTICAL, ANALYSIS, DEFAULT, */
/* LISTING, and HTMLBLUECML. */
/****************************************************************/
proc power;
twosamplemeans
groupmeans = (13 14) (13 14.5) (13 15)
stddev = 1.2 1.7
groupweights = 1 | 1 2 3
power = 0.9
ntotal = .;
run;
proc power;
twosamplemeans
nfractional
meandiff = 1 to 2 by 0.5
stddev = 1.2 1.7
groupweights = (1 1) (1 2) (1 3)
power = 0.9
ntotal = .;
run;