two-tail test


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two-tail test

[′tü ‚tāl ‚test]
(statistics)
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References in periodicals archive ?
As we now have a two-tail test our critical region of 5 % is split between the tails.
Comparing the means of the two subsets, the calculated t-statistic of 1.49 is statistically significant at the 10% level in a one-tail test (15.6% in a two-tail test).
For the early, later, and entire samples we found a statistically significant difference at the .01 level between firm disappearance in the sample and control groups for Years 0-3 individually, Years 1-4 collectively, and for the aggregate respective sample periods using the two-tail test. Therefore, H1a is supported by our study.
A test is either a one-tail or two-tail test, depending on the values of the sample result (usually, the sample proportion or sample mean) for which we reject the null hypothesis.