1937

最新文章

• The exact value of the moments of the distribution of x2, used as a test of goodness of fit, when expectations are small AI翻译
  作者：Haldane, JBS
  摘要：In genetical work it is often desirable to apply Pearson''s x2 test of agreement between observation and theory to groups of families containing so few members that the original test is inapplicable. The first 4 moments are calculated in a number of such cases, and the method of application is explained.
• On the z-test in randomized blocks and latin squares AI翻译
  作者：Welch, BL
  摘要：The z-test for treatment effects in randomized blocks and Latin square exps. is discussed. The distribution of z generated by randomization on the null hypothesis is compared with the z-distribution of normal theory. The comparison is made through the medium of a monotonic function U of z. The mean U on randomization agrees with the normal theory value, but the variance differs. The results are applied to uniformity trials. The discrepancy between the randomization and normal theories was not ...
• A biometric study of the human malar bone AI翻译
  作者：Woo, TL
  摘要：Four measurements (providing 2 indices) were taken on the malar bones of 639 [male] and 71 [female] skulls representing 14 races. No clear sexual difference in shape was found. The left bones tended to be slightly larger than the right. Most of the mean measurements indicated clear racial differences, and the Eskimo type was found to diverge markedly from all others on account of its large size and unusual shape. The measurements should be a valuable aid in testing problems of racial classific...
• Some aspects of the problem of randomization AI翻译
  作者：Pearson, ES
  摘要：This paper discusses some aspects of the conceptual model which the mathematical statistician introduces in bringing probability theory into play as a guide to practical action. In particular the conception of randomization is discussed and illustrated.
• A contribution to Eskimo craniology based on previously published measurements AI翻译
  作者：Morant, GM
  摘要：The material discussed consists of 850 [male] Eskimo skulls measured by Furst and Hansen and Hrdlika. They relate to populations extending from the extreme north-east of Asia to Greenland. Seven regional groups are distinguished and the coefficients of racial likeness between them are given. Four are found to be closely related to one another, while the Greenland and an early Alaskan series diverges from these in one direction and a Western Alaskan series diverges from them in another directio...
• The distribution of the ratio of covariance estimates in two samples drawn from normal bivariate populations AI翻译
  作者：Hirschfeld, HO
  摘要：This paper is a contribution to statistical tests of significance for 2-variate problems. In particular it deals with testing the difference between 2 correlation-coefficients. To this end the above random-sample distribution is developed and the case where the 2 samples have been drawn from the same normal population is more closely examined. It is shown that under these conditions the probability integral is a finite weighted sum of incomplete [beta]-functions, the weights being complete [be...
• A contribution to the biometric study of the human mandible AI翻译
  作者：Cleaver, FH
  摘要：Original measurements of 2 English and a native Australian (d1 and 9) and a Punjabi ([male] only) series of mandibles, comprising a total of 338 bones, are analysed. The technique used is that described in earlier papers in Biometrika, and estimates obtained of the accuracy with which the measurements were taken are discussed. Other topics dealt with are methods of sexing, sexual differences, variabilities, correlations and asymmetry. Special attention is paid to the coefficients of racial lik...