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In statistical significance testing, a one-tailed test and a two-tailed test are alternative ways of computing the statistical significance of a parameter...

one-tailed test above. In order to consider both the biases, we use a two-tailed test. Note that to do this we cannot simply double the one-tailed p-value...

Student's t-test is a statistical test used to test whether the difference between the response of two groups is statistically significant or not. It is...

leg length and foreleg length. This is a two-tailed test, rather than a one-tailed test. For the two tailed test, the alternative hypothesis is that hind...

the t-distribution to test one of two possible null hypotheses: that the two population means are equal, in which a two-tailed test is applied; or that...

one-tailed and two-tailed p-values can be calculated as Φ(Z)(for lower/left-tailed tests), Φ(−Z) (for upper/right-tailed tests) and 2Φ(−|Z|) (for two-tailed...

certain value. A one-tailed hypothesis is said to have directionality. Fisher's original (lady tasting tea) example was a one-tailed test. The null hypothesis...

distribution, as in a one-tailed test, or partitioned to both sides of the distribution, as in a two-tailed test, with each tail (or rejection region) containing...

chi-squared distribution with one degree of freedom. This gives a two-tailed test. The approximation is reliable for more than 20 subjects with any number...

groups. The formal test statistic for Dunnett's test is either the largest in absolute value of these t-statistics (if a two-tailed test is required), or...

strong that men and women are not equally likely to be studiers. For a two-tailed test we must also consider tables that are equally extreme, but in the opposite...

called a one-tailed test. However, one might be interested in deviations in either direction, favoring either heads or tails. The two-tailed p-value, which...

example is termed a one-sided or a one-tailed test while the generalization is termed a two-sided or two-tailed test. The statement also relies on the inference...

The tail flick test is a test of the pain response in animals, similar to the hot plate test. It is used in basic pain research and to measure the effectiveness...

the revised test statistic T−50. Using one of these sampling distributions, it is possible to compute either a one-tailed or two-tailed p-value for the...

Omnibus test One- and two-tailed tests One-class classification One-factor-at-a-time method One-tailed test – redirects to One- and two-tailed tests One-way...

hypothesis of the two-tailed test is: H 0 : p 1 = p 0 {\displaystyle H_{0}:p_{1}=p_{0}} There is no universal definition of the two-tailed version of Fisher's...

data collection, outlier rejection, choice of test statistic, choice of one-tailed or two-tailed test, etc. These choices in the "garden of forking paths"...

The tail suspension test (TST) is an experimental method used in scientific research to measure stress in rodents. It is based on the observation that...

published table as representing a one-tailed test when in fact the values mirrored the binomial values for a two-tailed test. Wilson and colleagues published...