A multinomial Bayesian approach to the estimation of population and vocabulary size
估计总体规模与词汇量的多项分布贝叶斯方法AI 解读 ↓
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估计总体规模与词汇量的多项分布贝叶斯方法AI 解读 ↓
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We approach estimation of the size of a population or a vocabulary through a Bayesian analysis of the multinomial distribution. We view the sample as being generated from such a distribution with an unknown number of cells and unknown cell probabilities, and develop a Bayesian procedure to estimate the number of cells and the coverage of the sample. The prior distribution of the number of cells is arbitrary. Given that number, the cell probabilities are assumed to follow a symmetric Dirichlet prior. A two-stage approach is developed for use when the flattening constant of the latter prior cannot be specified in advance. Our procedures are applied to samples of butterflies, insect species and alleles, to the works of Shakespeare and Joyce, and to Eldridge's sample of English words.