Course TopicsPower 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 ...

Timely research requires smaller sample sizes or rapid sampling of larger numbers of subjects. The trade-off means qualitative data from fewer people or less data collected from a larger sample.

Real World Example of Sample Size Neglect To better understand Sample Size Neglect, consider the following example, which is drawn from Tversky and Kahneman's research: ...

For example, sample-size reestimation could be implemented on its own or incorporated into group sequential, dose-selection, or population-enrichment designs. In this review, we focus on adaptive ...

So I check 20% of the latter and only 5% of the former, for example. This is how I relate Risk to the Sample Size.