one-tailed test


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one-tailed test

[¦wən ¦tāld ′test]
(statistics)
A statistical test in which the critical region consists of all values of a test statistic that are less than a given value or greater than a given value, but not both. Also known as one-tail test.
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(a) All scales based on 7-point response scale, 1 = strongly disagree to 7 = strong agree, (b) Wait Time for Intake in days (how long between triage and meeting assigned counselor) (c) Prior Counseling (have you ever been in counseling before now, 1 = Yes, No = 2 (d) Indicates an independent samples t-test difference in means (Males-Females), * p < .05 (two-tailed test) (e) Indicates an independent samples t-test difference in means (Males-Females), * p < .05 (one-tailed test)
We planned to be able to detect a statistically significant effect with four control patients for every burn patient, using a one-tailed test. The records from 24 control patients and six burn patients were reviewed for this study.
A z-test for a single proportion found that 72.7% was significantly higher than 18.75%, z = 4.58, p < .001, one-tailed test. The probability of a team being in the top three from 1982 to 2014 was .0938.
The estimated effect of population growth is negative as expected and is statistically significant albeit at the 0.133/2=6.65 % level of a one-tailed test. The one-period lagged value of per capita real GDP exerts a statistically significant positive effect on the current period's per capita real GDP.
Again, all of the overall means were negative and significantly below zero for all eight quality of life variables (all p's < .05 for one-tailed test).
In order to pool all females for the statistical analyses we first analyzed reproductive condition (open vagina, pregnant, and sucking) using a Mann-Whitney 17-tests (One-tailed test, a = 0.05) for each behavioral category.
The value of t-critical will be obtained from the one-tailed test t-table with a critical error equal to 0.05.
(d) More money 19 8 Less money 60 85 UNPROMPTED No change 12 8 UNPROMPTED Don't know/refuse 9 0 Notes: (a) On the basis of a difference of percentages test, the difference between "More often" and "Less often" is statistically significant among the Nisga a responses at least at the 0.05 level of significance using a one-tailed test. The overall differences in responses between the Nisga a and Tsimshian are not statistically significant based on a Chi-square Fisher's Exact 2-sided score of 0.341.
Table Two: Logit Regression of 1991 Senate SDI Votes Vote Number: 171 172 173 Constant -2.6245 -1.7765 -2.6156 (.6831) (.5670) (.6537) PID .9081 -.2363 0.8638 (.9322) (.9610) (.7551) Ideology .0514 *** .0518 *** .0435 *** (.0116) (.0125) (.0101) Benefit -.1842 -.8179 -.3031 (.7315) (.6851) (.6588) Election 1.1414 * 1.1531 * .6858 (.0716) (.0684) (.6347) Pseudo-[R.sup.2] .3986 .5060 .4687 -2 log likelihood 61.642 67.996 74.044 Goodness of Fit 64.960 100.376 86.445 N: 98 98 98 Note: Standard Errors are in parentheses * p < .10, one-tailed test ** p < .05, one-tailed test *** p < .01, one-tailed test
Results suggest that social contact with friends having SMI was associated with lower levels of social distance attitude ([beta] = -.21, p < .05, one-tailed test), and stereotype toward SMI was associated with higher levels social distance attitude ([beta] = .26,p < .05, one-tailed test).
For instance, the alpha could be set as a .05 one-tailed test instead of a two-tailed test.
In three out of cases the p-value for the one-tailed and two-tailed test was 0.0000, while for the case -10AB vs -10 BA the p-value for the one-tailed test is 0.0031, and for the two-tailed test for the same case the p-value is 0.0061.