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Statistics and Research Methods Workshops Home
Statistics Workshops
Research Methods Workshops
Videos
Introduction
Hypothesis Tests
Hypothesis Tests and Error
Error Table
Distributions and Error
Statistical Power
Power Calculations
Factors That Influence Statistical Power
Alpha Level
Sample Size
Effect Size
Directional Versus Nondirectional Tests
Maximizing Power
Applications
Summary
Practice Exercises
Workshop Quiz

Factors That Influence Statistical Power

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There are four factors that influence statistical power. Click on the numbers below to see a demonstration of each factor.

1. Alpha Level

2. Sample Size

3. Effect Size

4. One-Tailed Versus Two-Tailed Tests

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