Biometrika

最新文章

• Tables of the probability integrals of symmetrical frequency curves in the case of low powers such as arise in the theory of small samples. AI翻译
  作者：Pearson, K; Stoessiger, B
  摘要：These tables for Pearson''s types II and VII may be used in testing correlation and regression coefficients. Certain applications of Student''s test are criticised.
• On the nature of the relationship between two of Student's variates (z1 and z2) when samples are taken from a bivariate normal population. AI翻译
  作者：Pearson, K
  摘要：The mean value of the correlation coefficient in samples of (n[long dash]2) from a parent population of correlation p is equal to the correlation of z1 and z2 in samples of size n from the same parent population. The regressions, however, are non-linear and the arrays heteroscedastic.
• The west Scottish skull and its affinities. AI翻译
  作者：Young, M
  摘要：Measurements are given of 901 adult modern skulls from Glasgow. On the basis of the coefficient of racial likeness the affinities of the [male] skulls are in the following order: British Iron Age, 17th century Londoners from Whitechapel, Lowland Scottish, 17th century Londoners from Farringdon St., Anglo-Saxon, British Neolithic. The Whitechapel [female][female] resemble the West Scottish most closely, followed by Lowland Scottish and Iron Age; the remaining groups follow the sequence shown in...
• Note on the distribution of the standard deviation of sets of three variates drawn at random from a rectangular distribution. AI翻译
  作者：Rietz, HL
  摘要：For more than 5/6 of the range the distribution is a parabola.
• Article on the craniology of East Asia AI翻译
  作者：Von Bonin, G
  作者单位：University of Illinois System; University of Illinois Chicago; University of Illinois Chicago Hospital
  摘要：On the basis of the coefficient of racial likeness the populations considered fall into 3 groups: (1) Far Eastern: Chinese (Fukien and Peking) and Japanese; (2) Nesiot: Tagalogs and Dyaks; (3) Malay: Javanese, Aetas and Burmese. There are resemblances between Japanese and Tagalogs and between Dyaks and Middle Javanese. The Andamanese and Aetas are apparently dwarfed Malays rather than members of a separate Negrito race. The modern Chinese and Japanese resemble the prehistoric Chinese but not t...
• On the asymmetry of the human skull. AI翻译
  作者：Woo, TL
  摘要：From measurements of Egyptian skulls it ia found that the skull is definitely and markedly asymmetrical, not only in individuals, but in the means. On the whole, the right side is larger than the left, especially the frontal and parietal bones. The left malar bone is the larger. The right and left measurements of the face and forehead are most highly correlated. Differences in variability are less marked than in means. Whatever causes, associated with brain growth, or otherwise, lead to domina...
• On the mean character and variance of a ranked individual, and the mean variance of the intervals between ranked individuals. AI翻译
  作者：Pearson, K; Pearson, MV
  摘要：Approximate formulae are obtained for the mean value of any rank in samples of n from any population in which the abscissa can be expressed in powers of the frequency up to the corresponding ordinate. Unfortunately in a normal distribution for very small samples and very extreme ranks the formulae are liable to deviate sensibly from the correct values. For n> 15 the approximation is close. This affords a general solution of Galton''s Problem, that of finding the mean interval between any 2 ind...
• A study of the recently excavated Spitalfields crania. AI翻译
  作者：Morant, GM; Hoadley, MF
  摘要：This series of about 950 London crania is distinguished from all other known British series, except the 14th and 15th century Kentish crania from Hythe, by small size of calvaria, high cephalic, height-length and nasal indices and low orbital index; it resembles Pompeian, Etruscan, Parisian, Finnish and Viennese series. There is no historical or archeological evidence on date of interment, but this was probably medieval or Roman. One skull shows an advanced stage of syphilis. Individual measur...
• A study of the distribution of the variance in small samples. AI翻译
  作者：Le Roux, JM
  作者单位：Stellenbosch University
  摘要：The main object of this investigation is to study the first 4 moments of D (s2), the sampling distribution of the variance, in order to obtain suitable Pearson curves to represent D(s2) for populations which can themselves be represented by Pearson curves. The manner in which D (s2) alters as the population and the sample size alter is traced out: (1) Type I, Type VI and Type IV distributions are indicated, the latter being mostly associated with very leptokurtic Type IV populations; (2) a ser...
• Distribution of the median, quartiles and interquartile distance in samples from a normal population AI翻译
  作者：Hojo, T
  摘要：The sampling distribution of the median is nearly normal in all cases; it gives a somewhat less reliable estimate of the population mean than the sample mean does. For very small samples there is little to choose in accuracy between the median and the center (mid-point of range). For large samples the center becomes relatively increasingly unreliable, while the standard error of the median has almost reached its limiting value when n = 20. The standard error of the mean is [image] (where a is ...