Power analyses and sample size calculations are important parts of many research projects. Often, before data are even collected, it is necessary to calculate and justify the required sample size for ...

Hypothesis testing is perhaps the most widely used statistical analysis tool in all of research yet it is not well understood by many resulting in claims beyond the scope of what is possible. One ...

Researchers have improved the assessment of consistency in meta-analysis. The improved consistency measure considers statistical power, and it has potential to alter the interpretation of ...