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ERIC Number: ED107674
Record Type: RIE
Publication Date: 1975-Apr
Pages: 5
Abstractor: N/A
Reference Count: 0
ISBN: N/A
ISSN: N/A
The Use of Reliability Coefficient to Increase Accuracy of the Calculation of n in Power Formulas.
Ary, Donald; Karabinus, Robert
The power of a statistical test is, in part, a function of the reliability of the dependable variable being analyzed. The substitution of sigma square divided by the reliability coefficient for sigma is proposed. This enables the researcher to incorporate dependent variable reliability information when determining the sample size required for a specified power of his statistical test. An inverse relationship between test reliability and the sample n required to maintain a given statistical power is defined. (Author)
Publication Type: Reports - Research
Education Level: N/A
Audience: N/A
Language: N/A
Sponsor: N/A
Authoring Institution: N/A
Note: Paper presented at the Annual Meeting of the American Educational Research Association (Washington, D.C., March 30-April 3, 1975)