A plain-language glossary for TAR, sampling, and defensibility.

A range around a sample-based estimate that is likely to contain the true value, at a stated confidence level.

Why it matters: A recall or elusion estimate without an interval is only half a number.

The half-width of a confidence interval; how far the estimate may sit from the true value.

Why it matters: It is the precision you are buying with a given sample size.

The number of documents drawn for a statistical estimate, set by the target precision, confidence level, and how rare the trait is.

Why it matters: There is no universal number; it follows from the assumptions you state up front.

The set of documents predicted non-responsive and set aside, also called the discard set.

Why it matters: It is the population an elusion test samples from to check what was missed.