How to Design and Evaluate Research in Education, 5/e

Jack R. Fraenkel, San Francisco State University
Norman E. Wallen, San Francisco State University

Statistics in Perspective

Learning Objectives

Studying this chapter should enable you to:

Apply several recommendations when comparing data obtained from two or more groups.

Apply several recommendations when relating variables within a single group.

Explain what is meant by the term "effect size."

Describe briefly how to use frequency polygons, scatterplots, and crossbreak tables to interpret data.

Differentiate between statistically significant and practically significant research results.

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