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Introduction to quantitative systematics. Bulletin of the AMNH ; v. 93, article 5

Show simple item record Cazier, Mont A. en_US Bacon, Annette Louise. en_US 2005-10-05T22:03:14Z 2005-10-05T22:03:14Z 1949 en_US
dc.description p. 347-388 : ill. ; 26 cm. en_US
dc.description Includes bibliographical references (p. 388). en_US
dc.description.abstract "Inasmuch as the frequency distributions of many biological data approach the normal probability curve as developed by statisticians it is often possible for the taxonomist to adopt various statistical measures based on this type of distribution in the systematic analyses of biological material. The ones most commonly employed by the systematist to analyze normally distributed data are those of the central tendency (mean, median, and mode), of variation (standard deviation), of variability (coefficient of variability), and of reliability (standard errors). The mean is an expression of the average tendency in the sample and serves as a point on the variation scale from which the measure of variation can be oriented. The median and mode are measures of central tendency used primarily in comparing the frequency distribution of the sample with the normal curve to reveal possible skewness. The standard deviation is the measure of variation with which the systematist estimates the range of variation in the population from which a particular sample was taken. The population range is calculated as the mean of the sample plus and minus three standard deviations of the sample (M [plus or minus] 3 S.D.) which gives the systematist the range of variation within which would occur approximately 100 per cent of the total population represented by that sample. The coefficient of variability enables the systematist to establish the relationship between the variation and the mean size of the sample, giving the relative variability which can then be used in making comparisons. The standard errors indicate the reliability of the preceding measures and are used to show the systematist the theoretical range of variation of any of these measures, within which range would be found the same measures of additional samples drawn from the same population. With these statistical tools and a knowledge of the biology and distribution of the population, the systematist should be able to establish more accurately the classification status of his samples"--P. [387]. en_US
dc.format.extent 12943106 bytes
dc.format.mimetype application/pdf
dc.language eng en_US
dc.language.iso en_US
dc.publisher New York : [American Museum of Natural History] en_US
dc.relation.ispartofseries Bulletin of the American Museum of Natural History ; v. 93, article 5 en_US
dc.subject.lcc QH1 .A4 vol.93, art.5, 1949 en_US
dc.subject.lcsh Numerical taxonomy. en_US
dc.subject.lcsh Biology -- Classification -- Statistical methods. en_US
dc.title Introduction to quantitative systematics. Bulletin of the AMNH ; v. 93, article 5 en_US
dc.title.alternative Quantitative systematics en_US
dc.type text en_US

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  • Bulletin of the American Museum of Natural History
    The Bulletin, published continuously since 1881, consists of longer monographic volumes in the field of natural sciences relating to zoology, paleontology, and geology. Current numbers are published at irregular intervals. The Bulletin was originally a place to publish short papers, while longer works appeared in the Memoirs. However, in the 1920s, the Memoirs ceased and the Bulletin series began publishing longer papers. A new series, the Novitates , published short papers describing new forms.

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