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A Cosine Approximation to the Normal Distribution

Published online by Cambridge University Press:  01 January 2025

David H. Raab
Affiliation:
Brooklyn College
Edward H. Green
Affiliation:
Brooklyn College

Abstract

A cosine function is suggested to approximate the normal distribution as a device for simplifying algebraic manipulations of the latter. Numerical evaluations remain straightforward and employ only the commonly available trigonometric tables. A method of visual curve fitting requiring only an oscilloscope is also described.

Type
Original Paper
Copyright
Copyright © 1961 The Psychometric Society

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