Karen Copeland, Statistician, Boulder Statistics
While the question "How many (parts/subjects/runs) do I need?" is one nearly every statistician dreads, it is an important question and should be asked prior to running any study or experiment. The answer seems simple enough. Just plug some numbers into a calculator and off you go! In my experience, though, sample size calculations are rarely that easy.
JMP 16 introduced an entire suite of Sample Size Explorers, with more added in JMP 17. But why call them "explorers" and not "calculators"? Because sample size is more than a calculation. It is an integral part of a study design, and to determine a sample size, more than math is needed. This presentation explores sample size from the concept to the execution. While the examples include sample size explorations for medical device or diagnostics studies, the lessons learned are applicable across industries.
