Types of Errors and Power

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Author: Al Greene

Description:

• Review how to use level of significance (α) and critical values to determine statistical significance
• Discuss the concept of Type I (α )and Type II (β) Errors
• Discuss the concept of Power (1 – β)
• Discuss how to reduce type I and type II errors

This packet introduces you to types of error of a statistical test. There are type I and type II error, as well as the power of a test. We discuss how to find them, how to reduce them, and how to use them to determine statistical significance.

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Tutorial

What's in this packet

This packet brings up types of error. We have a slideshow discussing the two types of error, as well as power. We also have examples of each, and links to other sites talking about power and error in other fields. Some new terms in this packet are: