RT Book, Section A1 Portney, Leslie G. SR Print(0) ID 1186214159 T1 Comparing More Than Two Means: Analysis of Variance T2 Foundations of Clinical Research: Applications to Evidence-Based Practice, 4e YR 2020 FD 2020 PB F. A. Davis Company PP New York, NY SN 9780803661134 LK fadavispt.mhmedical.com/content.aspx?aid=1186214159 RD 2024/10/09 AB As knowledge and clinical theory have developed, clinical researchers have proposed more complex research questions, necessitating the use of elaborate multilevel and multifactor experimental designs. The analysis of variance (ANOVA) is a powerful analytic tool for analyzing such data when three or more groups or conditions are compared with independent groups or repeated measures. The ANOVA uses the F statistic, named for Sir Ronald Fisher, who developed the procedure.