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ERIC Number: EJ785187
Record Type: Journal
Publication Date: 2007-Sep
Pages: 14
Abstractor: Author
Reference Count: 0
ISBN: N/A
ISSN: ISSN-0033-3123
A Unified Approach to Power Calculation and Sample Size Determination for Random Regression Models
Shieh, Gwowen
Psychometrika, v72 n3 p347-360 Sep 2007
The underlying statistical models for multiple regression analysis are typically attributed to two types of modeling: fixed and random. The procedures for calculating power and sample size under the fixed regression models are well known. However, the literature on random regression models is limited and has been confined to the case of all variables having a joint multivariate normal distribution. This paper presents a unified approach to determining power and sample size for random regression models with arbitrary distribution configurations for explanatory variables. Numerical examples are provided to illustrate the usefulness of the proposed method and Monte Carlo simulation studies are also conducted to assess the accuracy. The results show that the proposed method performs well for various model specifications and explanatory variable distributions.
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Publication Type: Journal Articles; Reports - Descriptive
Education Level: N/A
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A