Basic design considerations --;Distributions and confidence intervals --;Comparing two independent groups for binary data --;Comparing two independent groups for ordered categorical data --;Comparing two independent groups for continuous data --;Cluster designs, repeated measures data and more than two groups --;Comparing paired groups for binary, ordered categorical and continuous outcomes --;Comparing survival curves --;Equivalence --;Confidence intervals --;Post-marketing surveillance --;The correlation coefficient --;Reference intervals and receiver operating curves --;Observer agreement studies --;Dose finding studies --;Phase II trials --;Sample size software (SSS).