We reexamine the subject of sample size determination (SSD) when testing logarithm of odds ratio (OR) against zero in two independent binomials. Four common approaches are considered: a closed-form SS ...

We present a simple sample-size formula for weighted log-rank statistics applied to clustered survival data with variable cluster sizes and arbitrary treatment assignments within clusters. This ...

Formal sample size calculation can help us think through what patient-based research can and cannot tell us about medicine.

Using the appropriate sample size formula, it was decided that 174 records needed to be examined. Using the Excel random selection function, the MBB randomly identified the 174 records.

Sample Size Neglect is a cognitive bias whereby people reach false conclusions by failing to consider the sample size in question.