Psyc 227
Introduction to Statistics
Dr. Fairchild
Review Guide for Exam #3
SECTION 1: Statistical Errors and Effect Size
1)
Know how a given alpha level relates to the amount of chance results
that you are willing to tolerate in a study.
2)
Be able to define and distinguish type 1 and type 2 errors. Know under
what conditions it is possible for each to occur.
3)
Understand the logic of statistical hypothesis testing being
probabilistic and how that translates into your confidence of results.
4)
Be able to identify criticisms of null hypothesis significance testing.
5)
Differentiate practical versus statistical significance.
6)
Understand how sample size affects statistical significance of a result.
Section 2: Onesample tests
1)
Understand what differentiates the one sample ztest from the one
sample ttest.
2)
Be able to read the description of a problem and identify what test is
appropriate to answer the research question.
3)
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 Spring '09
 Shinkareva
 Statistical hypothesis testing, Dr. Fairchild, alternative sampling distributions

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