Summary
Contents
When using the analysis of variance (ANOVA) in an experimental design, how can the researcher determine whether to treat a factor as fixed or random? This book provides the reader with the criteria to make the distinction between fixed and random levels among factors, an important decision that directly reflects the purpose of the research. In addition to exploring the varied roles random factors can play in social research, the authors provide a discussion of the statistical analyses required with random factors and give an overview of computer-assisted analysis of random factor designs using SAS and SPSSX.
Statistical Power
Statistical Power
As noted previously, experiments incorporating random factors require different significance tests than do standard designs involving only fixed factors. Although methods for estimation of power in fixed effects analysis are now widely familiar (most notably, Cohen, 1988), methods for estimation ...