Ontology highlight
ABSTRACT:
SUBMITTER: Olivier J
PROVIDER: S-EPMC3591379 | biostudies-literature | 2013
REPOSITORIES: biostudies-literature
Sample size calculations are an important part of research to balance the use of resources and to avoid undue harm to participants. Effect sizes are an integral part of these calculations and meaningful values are often unknown to the researcher. General recommendations for effect sizes have been proposed for several commonly used statistical procedures. For the analysis of 2×2 tables, recommendations have been given for the correlation coefficient φ for binary data; however, it is well known th ...[more]