More Results on Product Moments from a Finite Universe
有限总体乘积矩的进一步结果
In a previous paper [4] an estimate of the 4-variate product moment was obtained. This estimate had a slight bias, as we pointed out. In this paper an unbiased estimate of the 4-variate product moment is obtained. Asymptotic results for the 3-variate and 4-variate product moments and their estimates are also obtained.