Sample size justification
PMean: Sample size for comparing two diagnostic tests
Too much power and precision?
Justifying the sample size for a microarray study
What is an adequate sample size for establishing validity and reliability?
IRB review of a pilot study
Do your own power and sample size calculations
Variable cluster sizes and their impact on sample size calculations
Be sure to account for dropouts in your sample size calculation
Additions and improvements to my web pages
Is a 10% shortfall in sample size critical?
R libraries for sample size justification
How many charts should I pull?
Sample size for a binomial confidence interval
Sample size for a binary endpoint
Confidence interval for a correlation coefficient
Sample size calculation for a nonparametric test
Sample size for cluster randomized trials
Unequal sample sizes
Confidence intervals for complex research designs
Sample size for an ordinal outcome
Sample size calculations in studies with a baseline
Sample size for a diagnostic test
Sample size calculation example
Sample size for a survival data model
The minimal impact of population size on power and precision
Sample size for the Mann-Whitney U test
Binary outcome sample size calculations
Sample size for a confidence interval
Sample size for a diagnostic study