Sample Size Requirements for Testing and Estimating Coefficient Alpha
Journal of Educational and Behavioral StatisticsPublished 1 December 2002
Douglas G. Bonett
Citations562
SJR quartileQ1
SJR score1.25
SNIP1.55
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Abstract
An approximate test and confidence interval for coefficient alpha are derived. The approximate test and confidence interval are then used to derive closed-form sample size formulas. The sample size formulas can be used to determine the sample size needed to test coefficient alpha with desired power or to estimate coefficient alpha with desired precision. The sample size formulas closely approximate the sample size requirements for an exact confidence interval or an exact test.
Keywords
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