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A two-tailed test applied to the normal distribution. A one-tailed test, showing the p-value as the size of one tail. 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 ...
For example, you would use a two-tailed test if one random sample was 15 quarter horses and the second sample was 15 sires or dams of those same horses. A one-tailed test is appropriate if no known relationship exists between the samples, for example, two random samples of 15 unrelated quarter horses. -- 206.208.110.32 20:58, 17 August 2005 ...
2-4 . 3 × 2 = 30-44 The guttural pouch , a small outpocketing of the auditory tube that drains the middle ear , is a characteristic feature of Perissodactyla. [ 10 ] The guttural pouch is of particular concern in equine veterinary practice , due to its frequent involvement in some serious infections.
Their abdomen ends in three long tail-like structures, of which the lateral two are cerci, while the medial filament, which is longest, is an epiproct. The tenth abdominal segment is reduced. [8] The antennae are flexible. The two large compound eyes meet at the top of the head, and there are three ocelli.
The treeshrews (also called tree shrews or banxrings [3]) are small mammals native to the tropical forests of South and Southeast Asia.They make up the entire order Scandentia (from Latin scandere, "to climb"), [4] which split into two families: the Tupaiidae (19 species, "ordinary" treeshrews), and the Ptilocercidae (one species, the pen-tailed treeshrew).
[1] [8] It is quite common in many populations of white-tailed deer, which have built up a strong resistance. [4] After gastropod ingestion, moose or other deer may be hosts of the second- and third-stage worms. Moose resistance to P. tenuis is much lower than white-tailed deer, which results in a higher mortality rate. [9]
Caudoviricetes is a class of viruses known as the tailed bacteriophages (cauda is Latin for "tail"). [1] Under the Baltimore classification scheme, the Caudoviricetes are group I viruses as they have double stranded DNA (dsDNA) genomes, which can be anywhere from 18,000 base pairs to 500,000 base pairs in length. [ 2 ]
Here we see a system where there are more than two morphs: the phenotypes A, B, AB and O are present in all human populations, but vary in proportion in different parts of the world. The phenotypes are controlled by multiple alleles at one locus. These polymorphisms are seemingly never eliminated by natural selection; the reason came from a ...