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21.
Anju Goyal Vishal Maurya Amar Nath Gill 《Journal of Statistical Computation and Simulation》2013,83(3):472-485
In this paper, the three-decision procedures to classify p treatments as better than or worse than one control, proposed for normal/symmetric probability models [Bohrer, Multiple three-decision rules for parametric signs. J. Amer. Statist. Assoc. 74 (1979), pp. 432–437; Bohrer et al., Multiple three-decision rules for factorial simple effects: Bonferroni wins again!, J. Amer. Statist. Assoc. 76 (1981), pp. 119–124; Liu, A multiple three-decision procedure for comparing several treatments with a control, Austral. J. Statist. 39 (1997), pp. 79–92 and Singh and Mishra, Classifying logistic populations using sample medians, J. Statist. Plann. Inference 137 (2007), pp. 1647–1657]; in the literature, have been extended to asymmetric two-parameter exponential probability models to classify p(p≥1) treatments as better than or worse than the best of q(q≥1) control treatments in terms of location parameters. Critical constants required for the implementation of the proposed procedure are tabulated for some pre-specified values of probability of no misclassification. Power function of the proposed procedure is also defined and a common sample size necessary to guarantee various pre-specified power levels are tabulated. Optimal allocation scheme is also discussed. Finally, the implementation of the proposed methodology is demonstrated through numerical example. 相似文献
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In this article we present a simple bootstrap method for time series. The proposed method is model-free, and hence it enables us to avoid certain situations where the bootstrap samples may contain impossible values due to resampling from the residuals. The method is easy to implement and can be applied to stationary and nonstationary time series. The simulation results and the application to real time series data show that the method works very well. 相似文献
24.
Samridhi Mehta 《统计学通讯:理论与方法》2018,47(16):4021-4028
Sihm et al. (2016) proposed an unrelated question binary optional randomized response technique (RRT) model for estimating the proportion of population that possess a sensitive characteristic and the sensitivity level of the question. In our work, decision theoretic approach has been followed to obtain Bayes estimates of the two parameters along with their corresponding minimal Bayes posterior expected losses (BPEL) using beta prior and squared error loss function (SELF). Relative losses are also examined to compare the performances of the Bayes estimates with those of the classical estimates obtained by Sihm et al. (2016). The results obtained are illustrated with the help of real survey data using non informative prior. 相似文献
25.
Few prior studies have investigated the health of U.S. immigrants from the former Soviet Union (FSU). Utilizing data from
the 2000 U.S. census and the 2000–2007 National Health Interview Survey (NIHS), we compare levels of disability of FSU immigrants
with U.S.-born whites (ages 50–84). Our findings suggest an “epidemiologic paradox” in that FSU immigrants possess higher
levels of education compared with U.S.-born whites, but report considerably higher disability with and without adjustment
for education. Nonetheless, FSU immigrants report lower levels of smoking and heavy alcohol use compared with U.S.-born whites.
We further investigate disability by period of arrival among FSU immigrants. Changes in Soviet emigration policies conceivably
altered the level of health selectivity among émigrés. We find evidence that FSU immigrants who emigrated during a period
when a permission to emigrate was hard to obtain (1970–1986) displayed less disability compared with those who emigrated when
these restrictions were less stringent (1987–2000). Finally, we compare disability among Russian-born U.S. immigrants with
that of those residing in Russia as a direct test of health selectivity. We find that Russian immigrants report lower levels
of disability compared with Russians in Russia, suggesting that they are positively selected for health despite their poor
health relative to U.S.-born whites. 相似文献
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27.
Pawan Aurora Sumit Singh Shashank K. Mehta 《Journal of Combinatorial Optimization》2016,32(1):159-173
Given a graph \(G=(V,E)\) and a non-negative integer \(c_u\) for each \(u\in V\), partial degree bounded edge packing problem is to find a subgraph \(G^{\prime }=(V,E^{\prime })\) with maximum \(|E^{\prime }|\) such that for each edge \((u,v)\in E^{\prime }\), either \(deg_{G^{\prime }}(u)\le c_u\) or \(deg_{G^{\prime }}(v)\le c_v\). The problem has been shown to be NP-hard even for uniform degree constraint (i.e., all \(c_u\) being equal). In this work we study the general degree constraint case (arbitrary degree constraint for each vertex) and present two combinatorial approximation algorithms with approximation factors \(4\) and \(2\). Then we give a \(\log _2 n\) approximation algorithm for edge-weighted version of the problem and an efficient exact algorithm for edge-weighted trees with time complexity \(O(n\log n)\). We also consider a generalization of this problem to \(k\)-uniform hypergraphs and present a constant factor approximation algorithm based on linear programming using Lagrangian relaxation. 相似文献
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Fifty two foster parents participated in one of seven offerings of a two-and-a-half hour training on the issue of children caught in a loyalty conflict. Prior to the training foster parents completed a measure of their demographics, receptivity to learning about the issue, and their knowledge about the issue. Following the training the participants completed a measure of their perception that the training was helpful, their intent to change based on the training, and their knowledge about loyalty conflicts. They also participated in a focused discussion about loyalty conflicts. In this sample foster parents were found to have high levels of receptivity to training, high rates of perceived helpfulness of the training, and high levels of intent to change after the training as well as an increase in knowledge regarding loyalty conflict from before to after the training. Despite limitations in sampling strategy and sample size, the data support the belief that foster parents want to learn about this issue and can benefit from a single training on it. 相似文献
30.
Anju Mehta Achilles Armenakis Nikhil Mehta Feruzan Irani 《Journal of Labor Research》2006,27(3):323-338
We identify managerial challenges and opportunities faced by business process outsourcing (BPO) firms in India by interviewing
28 executives in lower (n = 10), middle (n = 11), and upper management (n = 7) in 15 BPO firms. Content analysis of the responses
revealed human resources and organizationrelated challenges as the most critical issues. SWOT (Strengths, Weaknesses, Opportu-nities,
Threats) analysis uncovered future opportunities, e.g., Knowledge Process Outsourcing. Secondary data, from four global research
agencies and a national trade association, supported our findings. Organizational changes to address challenges and to exploit
opportunities are explored. 相似文献