On the means and squared standard-deviations of small samples from any population
成果类型：
Article
署名作者：
Church, AER
刊物名称：
BIOMETRIKA
ISSN/ISSBN：
0006-3444
DOI：
10.2307/2331956
发表日期：
1926
页码：
321394
关键词：
摘要：
For small as well as large samples from a finite or infinite population the distribution of means is close to normal (except when the sampled population is extremely skew) and may be fitted satisfactorily by a Pearson curve. Under certain conditions approximately the same results are obtained by drawing from a finite or an infinite population. Distribution of a2 of small samples from an infinite population may be fitted with a Pearson curve by use of Tchouproff''s formulae for the moments. Corresponding formulae for samples from a finite population are derived, but are too complex for practical use. The technique of experimental sampling is considered;.