two-tailed test


Also found in: Acronyms, Encyclopedia, Wikipedia.

two-tailed test

 
a test analyzing a nondirectional hypothesis in which the researcher assumes that an extreme score can occur in either extreme of the sampling distribution.
Mentioned in ?
References in periodicals archive ?
The statistical significance was determined using Fisher's exact two-tailed test. For example, for the 2009 release of the Specimen hierarchy, approximately 20% of its concepts were overlapping.
Using two-tailed tests for the emotional exhaustion dimension, the significant predictors were emotional contagion (standardized [beta]=1.40, p<.05) and the interaction term between overidentification tendency and emotional contagion (standardized [beta]=1.60, p<.01).
In our tests of Hypothesis 1, we used nonparametric, two-sample, two-tailed tests of the difference between final grades assigned by full-time business faculty versus part-time business faculty in the two introductory accounting courses and in the first finance course.
In Case 1, Type-I error rates of two-tailed tests were determined at significance levels 1 - [alpha] = .90, .95, and .99 by computing the proportion of occasions (across the set of 20,000 tables) in which the statistic value exceeded either of the critical limits [b'.sub.[alpha]/2] and [b'.sub.1-[alpha]/2] for a two-sided size-[alpha] test, where these critical limits were determined for each table by obtaining coefficients [gamma] and [delta] through Equations (5) and (6) using the data from the current table and then transforming the limits in Appendix B through these coefficients.
Since the signs on the partial derivatives for the first four explanatory variables (UR, ME, HS&M, AGE65&M) are expected to be qualitatively the same in each equation for both males and females, it follows that the coefficients estimated for each of these variables must be subjected to a two-tailed test in order to determine whether there is a quantitative gender difference in the response to each of these variables (each of which is expressed according to gender).
The control variables for academic ability, ACT>25, and academic success, CUMGPA, were negative and significant at the one percent level in a two-tailed test. This is consistent with the idea that better students are less likely to overestimate their grades in this class.
(18) This is significantly different from the 33 of 66 (or 50%) selecting trust in the regular version of the trust game (with a p value of 0.069 in a two-tailed test).
Significance levels correspond to a two-tailed test of the null hypothesis that the coefficient equals zero.
This is a two-tailed test, so at [alpha] = 0.05, the tabulated t statistic is 4.303.
*Significant at the 0.10 level using a two-tailed test. **Significant at the 0.01 level using a two-tailed test.