This tutorial is designed to help you develop
a framework for choosing the correct test for an hypothesis about means. The
tutorial begins with an overview of the different tests
of means. It is followed by demonstrations
of the factors that are important to consider when choosing your tests.
Once you understand how to choose among tests of means,
you should test your knowledge by doing the practice
exercises.

This tutorial assumes that you know scales of
measurement; the central limit theorem; and how to conduct Z tests, the one-sample
t-test, and t-tests for dependent and independent means. The
tutorial is not designed to teach you the formulas and procedures for conducting
these tests. Rather, it focuses on how to select the appropriate statistic
to test a particular hypothesis.

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