This tutorial is designed to help you understand
statistical power and its importance in hypothesis testing. The tutorial begins
with a review of types of error.
It is followed by an explanation of statistical power and demonstrations
of the factors that influence statistical power. Once you understand
statistical power, you should test your knowledge
by doing the practice exercises.

This tutorial assumes that you understand the
concepts of population, probability, and error as well as the process involved
in testing hypotheses.

Students enrolled in PSYC230
- Applied Statistics for Psychology - who wish to receive extra
credit for doing the tutorial should take the quiz posted on the Blackboard
at Emory
class
site.