Teaching Statistics
Volume 41, Issue 2 p. 65-68
ORIGINAL ARTICLE

Using the standard Wald confidence interval for a population proportion hypothesis test is a common mistake

Shitao Yang, 

Shitao Yang

The Nathan M. Bisk College of Business, Florida Institute of Technology, Melbourne, Florida

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Ken Black, 

Corresponding Author

Ken Black

University of Houston Clear Lake, Houston, Texas

Correspondence

Ken Black, College of Business, University of Houston Clear Lake, Houston, Texas, USA.

Email: kenblackphd@aol.com

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First published: 07 November 2018
https://doi.org/10.1111/test.12184

Summary

Employing a Wald confidence interval to test hypotheses about population proportions could lead to an increase in Type I or Type II errors unless the hypothesized value, p0, is used in computing its standard error rather than the sample proportion.

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