阿尔夫威德森分布 Arfwedson distribution 发表评论(0) 编辑词条

A distribution, presented in 1951 by the Swede, Gerhard Arfwedson, concerned with the case where each observation takes one of k equally likely values. Let M be the random variable（随机变量） denoting the number of values that do not occur in a sample of size n.
The distribution has also been called the coupon-collecting distribution, since one application is to find the probability that a person having n randomly selected coupons (which might be cigarette cards, plastic toys from cereal packets, etc.) will have at least one of each of the k equally likely varieties.