Statistical analysis

News and Updates

Divide and Conquer: New Algorithm Examines Crime-Scene Bullets Segment by Segment

March 26, 2020

On the morning of March 22, 1915, residents of the small town of West Shelby, New York, awoke to a horrific scene. A woman clad only in a bloodied nightgown lay

NIST Quest for Climate-Friendly Refrigerants Finds Complicated Choices

February 17, 2017

BOULDER, Colo. – Researchers at the National Institute of Standards and Technology (NIST) have just completed a multiyear study to identify the “best”

How to Quantify the Weight of Forensic Evidence: A Lively Debate

June 2, 2016

On May 5 and 6, 2016, NIST hosted a technical colloquium on an important question facing virtually every branch of forensic science today: How should forensic

Projects and Programs

Statistical Process Monitoring for Autocorrelated Data

Develop statistical approaches to monitor process mean, process variability, and process capability indices for autocorrelated data.

AM Machine and Process Qualification

Machines and processes used to produce critical components for defense, aerospace, and medical applications must first be formally qualified. While

Quantifying Uncertainty in Accelerometer Sensitivity Studies

To compare the sensitivity of linear accelerometers.

Metrology for Real-Time Monitoring of Additive Manufacturing

Part quality in additive manufacturing (AM) is highly variable due to inadequate dimensional tolerances, surface roughness, and defects, thereby limiting its

Publications

Developing Cost Functions for Estimating Solar Photovoltaic System Installed Using Historical Data and OLS Regression

November 20, 2020

Author(s)

David H. Webb, Joshua D. Kneifel

Solar photovoltaics (PV) continues to increase in market share. Policy decisions and the nature of solar markets continue to shift; however, it is likely that

On The Quotient of Centralized and Non-Centralized Complex Gaussian Random Variables

September 23, 2020

Author(s)

Dazhen Gu

A detailed investigation of the quotient of two independent complex random variables is presented. The numerator has a zero mean, and the denominator has a non

Developing Cost Functions for Estimating Solar Photovoltaic System Installed and Life Cycle Costs Using Historical Quote Data

September 22, 2020

Author(s)

David H. Webb, Joshua D. Kneifel, Cheyney M. O'Fallon

Residential solar photovoltaic (PV) system installations have become more prevalent as the installed cost has decreased over the last 10 years while system

Linking Theory to Practice: Predicting Ballistic Performance from Mechanical Properties of Aged Body Armor

August 24, 2020

Author(s)

Amanda L. Forster, Dennis D. Leber, Amy E. Engelbrecht-Wiggans, Virginie A. Landais, Allen Chang, Emilien J. Guigues, Guillaume Messin, Michael A. Riley

It has long been a goal of the body armor testing community to establish an individualized, scientific-based protocol for predicting end-of-life of fielded body

Software

Smart Investment Tool

June 15, 2020

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

Extreme Winds and Wind Effects on Structures

The Engineering Laboratory has an established long-term collaboration with the NIST Statistical Engineering Division in the analysis of extreme wind speeds and