U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Mathematics & Statistics

Statistical analysis

News and Updates

Events

Projects and Programs

Breathalyzer

Standards Development to Ensure Reliable Breath Analysis in the Field

Ongoing
Numerous volatile organic compounds (VOCs) have been identified in human breath. These compounds can be produced by the body or by organisms in the body (e.g., bacteria or viruses) and provide a non-invasive window into human health. Inexpensive point-of-care devices are being developed to diagnose
Staff from the Department of Homeland Security participate in a hands-on exercise as part of the SED short course on experiment design.

Short Courses

Ongoing
Staff members of the Statistical Engineering Division regularly offer short courses on uncertainty analysis, design of experiments, and other topics in statistical metrology at NIST, at conferences open to the public, and at other government agencies. Prospective attendees of short courses at NIST
Charpy Machine

Charpy Impact Machine Verification Program

Ongoing
The low cost and simple configuration of the test have made it a common requirement in codes for critical structures. However, the test is not useful if the variation in test results between laboratories is not tightly controlled. The control is accomplished by requiring the indirect verification of

Publications

Guia Breve sobre la Incertidumbre de Medicion

Author(s)
Antonio Possolo, Maria Victoria Gelabert, David Hibbert, Jürgen Stohner, Olha Bodnar, Juris Meija
Esta Guía Breve reintroduce a los lectores en los principales conceptos y herramientas técnicas utilizadas para la evaluación y expresión de la incertidumbre de

Benford's law in atomic spectra and opacity databases

Author(s)
Yuri Ralchenko, Jean-Christophe Pain
The intriguing law of anomalous numbers, also named Benford's law, states that the significant digits of data follow a logarithmic distribution favoring the

Software

Calculator

Smart Investment Tool

This tool calculates metrics for investment analysis documented in NIST Advanced manufacturing Series 200-5. It calculates net present value, internal rate of