- statistics (of a significance test) concerned with the hypothesis that an observed value of a sampling statistic differs significantly from a given value, where an error in either direction is relevant: for instance, in testing the fairness of scales, an inspector will seek to exclude both overweight and underweight goodsCompare one-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
Examples from the Web for two-tailed
I repeated this experiment several times, and it always appeared to succeed; and all the two-tailed lizards were called mine.Olla Podrida
Frederick Marryat (AKA Captain Marryat)
I want to get that two-tailed toad, and Ill do anything in reason to secure a specimen.
Youd better come on and look for that two-tailed toad, Professor, advised Jerry.
But if I get my two-tailed toad Ill not want anything else, he said, as they got underway again.
And my two-tailed toad, added Professor Snodgrass, looking carefully on the ground as he advanced for a possible rare specimen.