Saddlepoint approximations for the studentized compound Poisson sums with no moment conditions in audit sampling are derived. This result not only provides a very accurate approximation for studentized compound Poisso...Saddlepoint approximations for the studentized compound Poisson sums with no moment conditions in audit sampling are derived. This result not only provides a very accurate approximation for studentized compound Poisson sums, but also can be applied much more widely in statistical inference of the error amount in an audit population of accounts to check the validity of financial statements of a firm. Some numerical illustrations and comparison with the normal approximation method are presented.展开更多
假设G是支撑在(-∞,+∞)上的适正分布,我们定义分布F(x)=sum from n=0 to ∞ pnG*n(x),其中pn,n≥0为R+上的序列,且对某个j≥1,pj>0。研究了在若干重尾分布族(如:正则变换,相容变换等)中F与G之间的关系,即给出支撑在(-∞,+∞)上的若...假设G是支撑在(-∞,+∞)上的适正分布,我们定义分布F(x)=sum from n=0 to ∞ pnG*n(x),其中pn,n≥0为R+上的序列,且对某个j≥1,pj>0。研究了在若干重尾分布族(如:正则变换,相容变换等)中F与G之间的关系,即给出支撑在(-∞,+∞)上的若干重尾分布族随机和的封闭性和渐进性,并将其应用到复合泊松分布和复合几何分布。展开更多
基金National Natural Science Foundation of China(Grant Nos. 71032005, 70802035)the MOE Project of Key Research Institute of Humanities and Social Science in University (Grant No. 07JJD63007)supported in part by National University of Singapore (Grant No. R-155-050-095-112)
文摘Saddlepoint approximations for the studentized compound Poisson sums with no moment conditions in audit sampling are derived. This result not only provides a very accurate approximation for studentized compound Poisson sums, but also can be applied much more widely in statistical inference of the error amount in an audit population of accounts to check the validity of financial statements of a firm. Some numerical illustrations and comparison with the normal approximation method are presented.
文摘假设G是支撑在(-∞,+∞)上的适正分布,我们定义分布F(x)=sum from n=0 to ∞ pnG*n(x),其中pn,n≥0为R+上的序列,且对某个j≥1,pj>0。研究了在若干重尾分布族(如:正则变换,相容变换等)中F与G之间的关系,即给出支撑在(-∞,+∞)上的若干重尾分布族随机和的封闭性和渐进性,并将其应用到复合泊松分布和复合几何分布。
