TY - CHAP M1 - Book, Section TI - Power and Sample Size A1 - Portney, Leslie G. A1 - Watkins, Mary P. PY - 2017 T2 - Foundations of Clinical Research: Applications to Practice, 3e AB - In Chapter 18 we introduced the concept of power as an important consideration in testing the null hypothesis. The purpose of this appendix is to describe statistical procedures for power analysis and estimation of sample size for studies using the t-test, analysis of variance, correlation, multiple regression, and chi-square for contingency tables. These procedures are based on the work of Cohen.1 For each procedure, formulas are provided, followed by specific examples of their use. SN - PB - McGraw-Hill Education CY - New York, NY Y2 - 2024/04/19 UR - fadavispt.mhmedical.com/content.aspx?aid=1138249755 ER -