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41.
Mahdi Teimouri 《统计学通讯:理论与方法》2013,42(11):3310-3322
ABSTRACTThe novel Balakrishnan skew-normal distribution introduced in 2008 has received considerable interest. Here, we derive stochastic representations for simulating order statistics of the novel Balakrishnan skew-normal distribution. The resulting algorithms are more efficient than the ordinary sorting algorithm. 相似文献
42.
Mohammad Baratnia 《统计学通讯:理论与方法》2013,42(18):4569-4580
AbstractThis paper provides an extension for “sequential order statistics” (SOS) introduced by Kamps. It is called “developed sequential order statistics” (DSOS) and is useful for describing lifetimes of engineering systems when component lifetimes are dependent. Explicit expressions for the joint density function, the marginal distributions and the means of DSOS are derived. Under the well known “conditional proportional hazard rate” (CPHR) model and the Gumbel families of copulas for dependency among component lifetimes, some findings are reported. For example, it is proved that the joint density functions of DSOS and SOS have the same structure. Various illustrative examples are also given. 相似文献
43.
AbstractFor two components and one standby redundancy, we develop a characterization on the hazard rate order and the reversed hazard rate order of the redundant system lifetime in the context of mutually independent components lifetimes. Also, the likelihood ratio order is derived on the lifetime of the series system with two components lifetimes and two matched active redundancies lifetimes both following the proportional hazard model. 相似文献
44.
S. Lynne Stokes 《统计学通讯:理论与方法》2013,42(12):1207-1211
Ranked set sampling is a procedure which may be used to improve the precision of the estimator of the mean. It is useful in cases where the variable of interest is much more difficult to measure than to order. However, even if ordering is difficult, but there is an easily ranked concomitant variable available, then it may be used to “judgment order” the original variable. The amount of increase in the precision of the estimator is dependent upon the correlation between the 2 variables. 相似文献
45.
G.H. Brown 《统计学通讯:理论与方法》2013,42(1):57-64
A two sample cest is proposea ior Liie hypuLiiefexo in.; LUSL observations from a second sample are equivalent, in distribution, to the smallest of r independent realisations of the first sample. Assuming H to be true the efficiency of parameter estimation for the exponential and normal distributions is then considered 相似文献
46.
K. Jayakumar 《统计学通讯:模拟与计算》2013,42(10):3092-3117
AbstractWe introduce a new family of distributions using truncated discrete Linnik distribution. This family is a rich family of distributions which includes many important families of distributions such as Marshall–Olkin family of distributions, family of distributions generated through truncated negative binomial distribution, family of distributions generated through truncated discrete Mittag–Leffler distribution etc. Some properties of the new family of distributions are derived. A particular case of the family, a five parameter generalization of Weibull distribution, namely discrete Linnik Weibull distribution is given special attention. This distribution is a generalization of many distributions, such as extended exponentiated Weibull, exponentiated Weibull, Weibull truncated negative binomial, generalized exponential truncated negative binomial, Marshall-Olkin extended Weibull, Marshall–Olkin generalized exponential, exponential truncated negative binomial, Marshall–Olkin exponential and generalized exponential. The shape properties, moments, median, distribution of order statistics, stochastic ordering and stress–strength properties of the new generalized Weibull distribution are derived. The unknown parameters of the distribution are estimated using maximum likelihood method. The discrete Linnik Weibull distribution is fitted to a survival time data set and it is shown that the distribution is more appropriate than other competitive models. 相似文献
47.
Rhonda magel 《统计学通讯:模拟与计算》2013,42(3):917-925
We consider a test for the equality of k population medians, θi i=1,2,….,k, when it is believed a priori, that θ i: The observations are subject to right censorhip. The distributions of the censoring variables for each population are assumed to be equal. This test is compared with the general k-sample test proposed by Breslow 相似文献
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Luis Firinguetti 《统计学通讯:模拟与计算》2013,42(2-3):689-714
The exact properties of the Lawless and Wang Operational Ridge Regression estimator are derived in the context of a misspecified regression equation. 相似文献