Would you commit to a multi-year research project if you knew there was an 85% chance of not finding the effect you were searching for? No rational person would, yet in many disciplines this happens all the time. Why? Because studies are not based on the prior analysis of statistical power.To learn how to design studies with sufficient power, you need to invest in a very good research methods or stats course. You'll be told to read a bunch of papers and dense texts written in complicated jargon. Who has time for that?Our manuals make statistical power analysis dead easy. Using simple FAQs and a class-tested approach characterized by easy-to-follow examples, they provide you with the tools you need to design studies that succeed!