Buy this Article for $5.95

Have a coupon or promotional code? Enter it here:

When you buy this you'll get access to the ePub version, a downloadable PDF, and the ability to print the full article.


effect size, power analysis, research methods, sample size



  1. Albert, Nancy M. PhD, RN, CCNS, CCRN, CHFN, NE-BC, FAHA, FCCM
  2. O'Connor, Priscilla C. PhD, PMHCNS-BC