Sample size estimation and statistical power analyses

Research output: Contribution to journalArticle

View graph of relations Save citation


Research units


The concept of sample size and statistical power estimation is now something that Optometrists that want to perform research, whether it be in practice or in an academic institution, cannot simply hide away from. Ethics committees, journal editors and grant awarding bodies are now increasingly requesting that all research be backed up with sample size and statistical power estimation in order to justify any study and its findings. This article presents a step-by-step guide of the process for determining sample sizeand statistical power. It builds on statistical concepts presented in earlier articles in Optometry Today by Richard Armstrong and Frank Eperjesi.


Original languageEnglish
JournalOptometry Today
Issue numberJuly
Publication statusPublished - 16 Jul 2010


  • sample size, statistical power, estimation

Employable Graduates; Exploitable Research

Copy the text from this field...