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Choice of Test Length and Sample Size to Maximize Power of a Statistical Test for a Given Cost DWEH

Author(s):
Cleary, T. Anne; Linn, Robert L.
Publication Year:
1968
Report Number:
RB-68-21
Source:
ETS Research Bulletin
Document Type:
Report
Page Count:
15
Subject/Key Words:
Department of Health, Education, and Welfare (DWEH), Analysis of Variance (ANOVA), Sampling, Test Construction, Test Reliability, Test Theory

Abstract

The effect of reliability of the dependent variable on the power of an F test for a one-way analysis of variance is considered. Using the assumptions of classical test theory and a simple cost model, three methods of determining the optimum allocation of resources to test length and sample size are compared. The methods vary in accuracy, but all three have potential use for practical problems.

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