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PIARC (World Road Association), founded in 1909 and comprising 125 member governments from all over the world, is the global forum for exchange of knowledge and experience on roads, road transport policies and practices. With consultative status to the Economic and Social Council of the United Nations, the Association is contributing to a stable and sustainable global development of the road and transport sector.

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Term of the Road Dictionary

outlier

Language : PIARC Road Dictionary / English
Theme : Scientific and Technical Tools Mathematics and Statistics
Definition : Value in a series of homogeneous data which has a much lower probability of occurrence than expected according to the sample size and distribution. Note: an outlier is suspected of being an erroneous measurement, and may be eliminated under certain conditions [COST 323].