Statistical Methods for Rates and Proportions

Deals with methods for the design and analysis of surveys, studies and experiments when the data are qualitative or categorical. Estimation of the degree of association or difference assumes equal importance with assessment of statistical significance. Presents the standard error for most measures of association or difference mentioned in the text. New topics include: construction of confidence intervals; planning of comparative studies with unequal sample sizes; the Fisher-Irwin "exact" test for a fourfold table; attributable risk; the Cornfield method for making inferences about the odds ratio; and measuring inter-rater agreement. Includes new and revised problems and worked examples.