ONE-TAILED TEST

A statistical test where the critical area of a circulation is one-sided so that it is either less than or greater than a specific value, but not both. When the sample which is being tested falls to the one-sided critical area, the substitute premise will be acknowledged instead of the null premise. One-tailed test obtains its name from testing the area under one of the tails of a usual distribution, though the test may be used in other non-normal distributions too.