In statistical significance testing, a one-tailed test and a two-tailed test are alternative ways of computing the statistical significance of a parameter...
12 KB (1,759 words) - 11:25, 12 February 2024
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 tests) where...
12 KB (1,791 words) - 14:35, 4 February 2024
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...
87 KB (8,280 words) - 16:24, 10 June 2024
Null hypothesis (category Statistical hypothesis testing)
Directed tests combine the attributes of one-tailed and two-tailed tests. "...directed tests should be used in virtually all applications where one-sided...
39 KB (5,319 words) - 17:06, 30 April 2024
location test of the null hypothesis such that the means of two populations are equal. All such tests are usually called Student's t-tests, though strictly...
49 KB (6,770 words) - 04:40, 17 May 2024
the 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...
11 KB (1,795 words) - 16:41, 10 July 2023
the results of the tail flick test and it is important to consider this effect when performing the test. Lastly, many thermal tests do not distinguish...
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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...
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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 of the population...
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between hind 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...
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a pooled t-test or the Welch's t-test for two sample tests or analysis of variance or Welch's modified oneway ANOVA for multi-level tests. However, it...
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critical values for any given percentage point depend on: whether a one- or- two-tailed test is performed; the number of groups being compared; the overall...
14 KB (2,417 words) - 08:54, 13 June 2024
if the population distributions are normal or are light-tailed and symmetric, then ANOVA F-test will generally have greater power which is the probability...
19 KB (2,415 words) - 14:19, 5 March 2024
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...
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kstest and kstest2 for one-sample and two-sample Kolmogorov–Smirnov tests, respectively. The R package "KSgeneral" computes the KS test statistics and its...
32 KB (4,063 words) - 11:41, 18 May 2024
P-value (redirect from Two-sided P value)
of the test statistic and the hypotheses of interest about its distribution, different null hypothesis tests have been developed. Some such tests are the...
55 KB (6,739 words) - 08:15, 12 June 2024
unmistakable wedge-shaped tail, an elongated upper mandible, a strong beak and powerful feet. The wedge-tailed eagle is one of 12 species of large, predominantly...
169 KB (22,898 words) - 06:00, 2 May 2024
original 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...
82 KB (10,222 words) - 07:35, 1 June 2024
sample sizes. It is named after its inventor, Ronald Fisher, and is one of a class of exact tests, so called because the significance of the deviation from...
29 KB (3,956 words) - 00:17, 28 February 2024
December 2008 and August 2009, was undertaken to validate the design and gradually expand the aircraft operating envelope. The flight tests were complete...
17 KB (1,332 words) - 17:14, 9 June 2024
Permutation, Parametric, and Bootstrap Tests of Hypotheses (3rd ed.). New York: Springer. Derrick, B; Ruck, A; Toher, D; White, P (2018). "Tests for equality of...
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better. A two-tailed test may still be used but it will be less powerful than a one-tailed test, because the rejection region for a one-tailed test is concentrated...
38 KB (4,059 words) - 21:40, 29 May 2024
than by SNC. By December 2012, 15 full-scale tests had been successfully conducted, and additional ground tests continued into March 2013. In June 2012, the...
67 KB (5,639 words) - 18:38, 10 June 2024
essentially a V tail that extended both above and below the fuselage. The most popular conventionally V-tailed aircraft that has been mass-produced is the...
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Fisher's method (redirect from Fisher's combined probability test)
for one-sided right-tailed p-values; minor modifications can be made if two-sided or left-tailed p-values are being analysed. Specifically, if two-sided...
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outlier. This table summarizes the limit values of the two-tailed Dixon's Q test. Grubbs's test for outliers Halpern, Arthur M. "Experimental physical...
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X and Y from two populations, the probability of X being greater than Y is equal to the probability of Y being greater than X. Nonparametric tests used...
44 KB (5,782 words) - 08:37, 2 June 2024
diverged from the ring-tailed lemur, making the group monophyletic and supporting the current two-genera taxonomy, or that the ring-tailed lemur is nested in...
82 KB (8,853 words) - 15:48, 6 May 2024
various one-tailed and two-tailed versions of the test in the wilcoxon_test function. SciPy includes an implementation of the Wilcoxon signed-rank test in...
42 KB (7,161 words) - 22:17, 19 February 2024
and short-tailed) were originally exhibited as two varieties of the one Cattle Dog breed, but by the 1950s, separate classes – Cattle Dog (long-tail)...
7 KB (777 words) - 17:22, 19 May 2024