also two-tail adjective Date: 1945 being a statistical test for which the critical region consists of all values of the test statistic greater than a given value plus the values less than another given value
TWO-TAILED
Meaning of TWO-TAILED in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012