Trapezoidal and Triangular Distributions for Type B Evaluation of Standard Uncertainty
Raghu N. Kacker, James F. Lawrence
A Type B standard uncertainty is determined from a probability distribution specified by scientific judgment based on all available information. The ISO-GUM discusses symmetric distributions only. Sometimes an asymmetric distribution is needed. We describe a trapezoidal distribution that may be asymmetric. Triangular and rectangular distributions are special cases of trapezoidal distribution. Then we discuss how a trapezoidal distribution may be used to determine an asymmetric correction for bias and its associated standard uncertainty.
and Lawrence, J.
Trapezoidal and Triangular Distributions for Type B Evaluation of Standard Uncertainty, Metrologia, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=50853
(Accessed February 23, 2024)