共查询到20条相似文献,搜索用时 296 毫秒
1.
Γ-分布类的条件概率封闭性 总被引:5,自引:0,他引:5
X服从参数α和λ的Γ-分布,V与Y分别服从参数θ和λ的指数分布.我们证明了:在X<Y的条件下,X的条件分布是参数α和θ+λ的Γ-分布;在X<V<X+Y的条件下,V的条件分布是参数α+1和θ+λ的Γ-分布.称此类性质为Γ-分布类的条件概率封闭性.对离散的负二项分布也证明了类似的结果. 相似文献
2.
3.
X(m)和Y(k)服从参数(m,λ)和(k,μ)的Erlang分布且相互独立.证明了在X(m)相似文献
4.
5.
6.
7.
本文研究了R=P(Y<X)在两种非对称损失函数下的Bayes估计问题,其中随机变量X和Y相互独立且服从不同的Burr XII型分布.利用Lindley近似方法,获得了Bayes估计的显式近似表达式,通过随机模拟比较了不同损失函数下的Bayes估计的性质. 相似文献
8.
9.
10.
李小军 《数学的实践与认识》2008,38(17)
针对老出版社普遍存在的奖金核定难问题,创建了一个数学模型:对经营部门,Y=X1+X2;对职能部门,Y=αY1;介绍了各参数的确定方法,并以实例形式作了说明.本模型具有协调稳定与发展、发扬民主、可操作性强、相对公平等优点. 相似文献
11.
12.
13.
Saralees Nadarajah 《数学物理学报(B辑英文版)》2010,30(1):330-340
Two posterior distributions for the mean of the Laplace distribution are obtained by deriving the distributions of the product XY and the ratio X/Y when X and Y are Student's t and Laplace random variables distributed independently of each other. Tabulations of the associated percentage points are given along with computer programs for generating them. 相似文献
14.
Local Solvability for a Class of Nonhomogeneous Left Invariant Differential Operators on HR \bigotimes Rk 下载免费PDF全文
Fu Chuli 《偏微分方程(英文版)》1990,3(2):16-26
In this paper we discuss tbe local solvability of the following nonhomogeneous left invariant differential operators on the nilpotent Lie group H_n⊗R^K: P(X, Y, T, Z) = Σ_{|α+β|+ζ+|y|≤m|α+β|+2l=a}a_{αβly}X^αY^βT^lZ^y where X_j, Y_j (j = 1, 2, …, n), T, Z_j(j = l, 2, …, K) are bases of left invariant vector fields on H_n⊗R^K and a_{αβly} are complex constants. 相似文献
15.
矩阵损失下随机回归系数和参数的线性Minimax估计 总被引:2,自引:0,他引:2
对于一般的随机效应线性模型Y=Xβ+ε,这里β和ε分别是p维和n维的随机向量,且E(βε)=(Aa0),Cov(βε)=σ2(V10
0V2),(Vi≥0,i=1,2)我们定义了Sα+Qβ的线性Minimax估计,在一定条件下得到了Sα+Qβ在线性估计类中的Minimax估计,并在几乎处处意义下证明了它的唯一性. 相似文献
16.
沈思 《数学物理学报(B辑英文版)》2007,27(4):821-828
In this article,the author obtains the large deviation principles for the empir- ical correlation coefficient of two Gaussian random variables X and Y.Especially,when considering two independent Gaussian random variables X,Y with the means EX. EY (both known),wherein the author gives two kinds of different proofs and gets the same results. 相似文献
17.
本文研究了独立随机变量之和的绝对矩的几个性质, 其中包括$\ep|X+Y|-\ep|X-Y|$的表达式, 这里$X$和$Y$是相互独立的随机变量. 相似文献
18.
Consider the correlation between two random variables (X, Y), both not directly observed. One only observes X? = φ(1)(U)X + φ(2)(U) and ? = ψ(1)(U)Y + ψ(2)(U), where all four functions {φ(l)(·),ψ(l)(·), l = 1, 2} are unknown/unspecified smooth functions of an observable covariate U. We consider consistent estimation of the correlation between the unobserved variables X and Y, adjusted for the above general dual additive and multiplicative effects of U, based on the observed data (X?, ?, U). 相似文献
19.
Moshe Shaked 《Annals of the Institute of Statistical Mathematics》1979,31(1):67-84
In this work we consider some familiar and some new concepts of positive dependence for interchangeable bivariate distributions.
By characterizing distributions which are positively dependent according to some of these concepts, we indicate real situations
in which these concepts arise naturally. For the various families of positively dependent distributions we prove some closure
properties and demonstrate all the possible logical relations. Some inequalities are shown and applied to determine whether
under- (or over-) estimates, of various probabilistic quantities, occur when a positively dependent distribution is assumed
(falsely) to be the product of its marginals (that is, when two positively dependent random variables are assumed, falsely,
to be independent). Specific applications in reliability theory, statistical mechanics and reversible Markov processes are
discussed.
This work was partially supported by National Science Foundation GP-30707X1. It is part of the author's Ph.D. dissertation
prepared at the University of Rochester and supervised by A. W. Marshall.
Now at Indiana University. 相似文献
20.
??This paper deals with reliability inference results in $R=\pr(Y相似文献