Notes and Considerations
See "NOTES Indep Samples t-test Sample Size Derivation.pdf" attached.
Data Set
Analysis or Script File
Examples using Statistica
Cephas Latex MEC Sample Size.doc (attached)
Cephas Sample Size.stw (attached)
Example Using R software
library(TeachingDemos)
?TeachingDemos
?power.examp
#-------------------------
# one interactive graphical demo
#-------------------------
power.examp(n = 1, stdev = 1, diff = 1, alpha = 0.05, xmin = -2, xmax = 4)
run.power.examp.old()
#-------------------------
#-------------------------
# another interactive graphical demo
#-------------------------
run.power.examp(hscale=1.5, vscale=1.5, wait=FALSE)
#-------------------------
library(TeachingDemos)
power.t.test