/****************************************************************/
/* S A S S A M P L E L I B R A R Y */
/* */
/* NAME: pwrex04 */
/* TITLE: Documentation Example 4 for PROC POWER */
/* (Noninferiority Test with Lognormal Data) */
/* PRODUCT: STAT */
/* SYSTEM: ALL */
/* KEYS: power */
/* sample size */
/* power analysis */
/* graphs */
/* PROCS: POWER */
/* DATA: */
/* */
/* SUPPORT: John Castelloe */
/* REF: */
/* MISC: */
/****************************************************************/
ods graphics on;
proc power;
twosamplemeans test=ratio
meanratio = 0.7 to 1.2 by 0.1
nullratio = 1.10
sides = L
alpha = 0.01
cv = 0.5 0.6
groupns = (300 180)
power = .;
plot x=effect step=0.05;
run;
ods graphics off;