hi boistatisticians
I am a medical statistical dummy and a journal editor threats me by asking for a power analysis....can someone help me?

There are many ways to do a power analysis - what is your study and what kinds of comparisons are you doing?

This page has a few links to various types of power analyses - they may help (scroll down to the heading Power Analysis):
http://davidmlane.com/hyperstat/Statistical_analyses.html