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%ما هو (من)٪ 1 - تعريف
SPECIES OF BIRD
Phytotoma raimondii; Peruvian Plantcutter
One- and two-tailed tests
![''p''-value of [[chi-squared distribution]] for different number of degrees of freedom](https://commons.wikimedia.org/wiki/Special:FilePath/Chi-square distributionCDF-English.png?width=200 "''p''-value of [[chi-squared distribution]] for different number of degrees of freedom")
![A '''two-tailed test''' applied to the [[normal distribution]].](https://commons.wikimedia.org/wiki/Special:FilePath/DisNormal06.svg?width=200 "A '''two-tailed test''' applied to the [[normal distribution]].")
![[[Normal distribution]], showing two tails](https://commons.wikimedia.org/wiki/Special:FilePath/Standard deviation diagram.svg?width=200 "[[Normal distribution]], showing two tails")
ALTERNATIVE WAYS OF COMPUTING THE STATISTICAL SIGNIFICANCE OF A PARAMETER INFERRED FROM A DATA SET
One-tailed test; Two-tail test; Two-tail; One-tailed; Two-sided test; Two-tailed test; One-sided test
In statistical significance testing, a one-tailed test and a two-tailed test are alternative ways of computing the statistical significance of a parameter inferred from a data set, in terms of a test statistic. A two-tailed test is appropriate if the estimated value is greater or less than a certain range of values, for example, whether a test taker may score above or below a specific range of scores.
one-tailed
ALTERNATIVE WAYS OF COMPUTING THE STATISTICAL SIGNIFICANCE OF A PARAMETER INFERRED FROM A DATA SET
One-tailed test; Two-tail test; Two-tail; One-tailed; Two-sided test; Two-tailed test; One-sided test
¦ adjective Statistics denoting a test for deviation from the null hypothesis in one direction only.
Golden starfrontlet
 (2).jpg?width=200)
The golden starfrontlet (Coeligena bonapartei eos) or golden-tailed starfrontlet, is usually considered a subspecies of hummingbird endemic to Venezuela. It is often considered a subspecies of the golden-bellied starfrontlet, C.
ويكيبيديا
Peruvian plantcutter
The Peruvian plantcutter (Phytotoma raimondii) is an endangered species of bird in the family Cotingidae. As the other plantcutters, this species is sexually dimorphic and folivorous. It is endemic to scrub and woodland in north-western Peru, and is threatened by habitat loss.
