by Hening Huang The Welch-Satterthwaite (WS) formula estimates an “effective degrees of freedom” of an approximate Chi-square distribution formed from a combination of several sample variances of independent normal populations. The effective degrees of freedom […]
By Richard Fertell, Hamed Ershad, York Xu, Osborne Gumbs, Tammy Tran This article is the first of a series describing how to perform liquid flow rate calibrations at fluid temperatures below +5 °C and above […]
by Christopher L. Grachanen On July 22, 2016, the US Bureau of Labor Statistics (BLS) published their second federal register denoting proposed changes and additions for the upcoming 2018 Standard Occupational Classification (SOC) system. The […]
by Dr. George Anastasopoulos As we discussed in my previous relative article “The new ISO/IEC 17025 – What to expect”, ISO/IEC 17025 was first issued in 1999 by the International Organization for Standardization (ISO) and […]
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