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one-tailed

British  

adjective

  1. statistics (of a significance test) concerned with the hypothesis that an observed value of a sampling statistic either significantly exceeds or falls significantly below a given value, where the error is relevant only in one direction: for instance, in testing whether scales are fair a customer does not regard overweight goods as a relevant error Compare two-tailed

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012