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A Graphical Test for the Significance of Differences between Frequencies from different Samples

Published online by Cambridge University Press:  01 January 2025

Donald W. Fiske  and
Jack W. Dunlap
Donald W. Fiske
Affiliation:
USNR
Jack W. Dunlap
Affiliation:
USNR
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Abstract

For testing the significance of differences between frequencies from different samples, an ellipse can easily be constructed on the basis of a formula developed on the assumption that both observed samples are random samples from the same parent population and that the best estimate of the true proportion is the weighted mean proportion of the two samples. The ellipse provides a very rapid method for testing pairs of frequencies.

Type
Original Paper
Information
Psychometrika , Volume 10 , Issue 3 , September 1945 , pp. 225 - 229
Copyright
Copyright © 1945 Psychometric Society

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Footnotes

*

The opinions expressed in this paper are those of the authors and are not to be construed as those of the Navy Department.

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