Authority and currency
About this authority
- Publisher
- National Institute of Standards and Technology
- Standing
- Primary authority
- Version
- Current web handbook verified 2026-08-07
- Relevant parts
- Glossary entries for population, sample, sample frame, parameter, statistic, and standard error; Sections 1.3.5.1, 1.3.5.2, 1.3.5.6, and 1.3.5.17
- Currency
- current · checked Aug 7, 2026
Sections 1.3.5.1 and 1.3.5.6 distinguish measures of location and spread and make their sensitivity to tail behavior visible. Section 1.3.5.17 treats an unusual observation as an investigation problem: it may be erroneous, may reflect ordinary variation, or may carry information that the model misses.
Section 1.3.5.2 supplies the bounded one-sample Student-t interval used here and gives its repeated-sampling interpretation. The curriculum independently computes original fictional examples and requires the sample design, degrees of freedom, critical value, assumptions, and interpretation boundary to remain visible.