In this paper an estimator of the finite population mean using auxiliary information in sample surveys has been proposed. The bias and mean squared error are obtained under large sample approximation. It has been shown that the proposed estimator performs better than some recently published estimators. 相似文献
Kernel density estimation is probably the most widely used non parametric statistical method for estimating probability densities. In this paper, we investigate the performance of kernel density estimator based on stratified simple and ranked set sampling. Some asymptotic properties of kernel estimator are established under both sampling schemes. Simulation studies are designed to examine the performance of the proposed estimators under varying distributional assumptions. These findings are also illustrated with the help of a dataset on bilirubin levels in babies in a neonatal intensive care unit. 相似文献
Control charts are widely known quality tools used to detect and control industrial process deviations in Statistical Process Control. In the current paper, we propose a new single memory-type control chart, called the maximum double generally weighted moving average chart (referred as Max-DGWMA), that simultaneously detects shifts in the process mean and/or process dispersion. The run length performance of the proposed Max-DGWMA chart is compared with that of the Max-EWMA, Max-DEWMA, Max-GWMA and SS-DGWMA charts, using time-varying control limits, through Monte–Carlo simulations. The comparisons reveal that the proposed chart is more efficient than the Max-EWMA, Max-DEWMA and Max-GWMA charts, while it is comparable with the SS-DGWMA chart. An automotive industry application is presented in order to implement the Max-DGWMA chart. The goal is to establish statistical control of the manufacturing process of the automobile engine piston rings. The source of the out-of-control signals is interpreted and the efficiency of the proposed chart in detecting shifts faster is evident. 相似文献
This paper, based on a primary sample survey over 1925 earning individuals in the cities of Kolkata, Cuttack and Bengaluru, examines how the individual and household characteristics influence the acts of giving in urban India. The regression results indicate income, family size and property ownership affecting likelihood and extent of giving. Likelihood to give is more with females, though males tend to donate more. There exists threshold income beyond which likelihood to donate is less. Characteristics like age, education, dependency ratio and marital status influence certain acts of giving. As the opportunity cost of non-cash giving increases with the rise in income, cash donations substitute non-cash giving. There also prevails complementarity in the acts of giving. On behavioral front, in addition to work–life balance and pledging, the notion of rational choice seems to be gaining ground.
We investigate the effect of introducing costs of complexity in the n‐person unanimity bargaining game. As is well‐known, in this game every individually rational allocation is sustainable as a Nash equilibrium (also as a subgame perfect equilibrium if players are sufficiently patient and if n & 2). Moreover, delays in agreement are also possible in such equilibria. By limiting ourselves to a plausible notion of complexity that captures length of memory, we find that the introduction of complexity costs (lexicographically with the standard payoffs) does not reduce the range of possible allocations but does limit the amount of delay that can occur in any agreement. In particular, we show that in any n‐player game, for any allocation z, an agreement on z at any period t can be sustained as a Nash equilibrium of the game with complexity costs if and only if t≤n. We use the limit on delay result to establish that, in equilibrium, the strategies implement stationary behavior. Finally, we also show that ‘noisy Nash equilibrium’ with complexity costs sustains only the unique stationary subgame perfect equilibrium allocation. 相似文献
This paper presents the results of an experiment on negotiation, designed to measure the impact of (1) computerized training and (2) information on negotiators' performanceThe paper is structured as follows. First, we review the literature on negotiation training. Second, we develop a conceptual framework to link various forms of Negotiation Support Systems to joint and individual negotiation performance. Third, we present the negotiation paradigm — a bilateral monopoly — and the computerized training system we used. Regarding training, our results show an asymmetric impact on individual performance levels and, unexpectedly, a negative impact on negotiators' joint performance. In contrast, more information improves both individual and joint performance. Finally, we discuss these results, and outline further research questions. 相似文献
This study examined the asset ownership of Asian immigrants using a nationally representative sample of newly legalized immigrants (New Immigrant Survey). Findings revealed that ownership of a business or farm, financial assets, and home ownership were associated with socioeconomic, demographic, and acculturation variables. Family income, education, English fluency, and length of stay were significant in all types of asset ownership. Variances in asset ownership by ethnic groups exist. Asian Indians and Koreans had higher levels of business asset ownership. Korean, and Filipino immigrants were also more likely to be homeowners. Asian Indian and Chinese immigrants were more likely to own financial assets. Vietnamese lagged in business or farm and financial asset ownership. Findings provided insights into the investment decisions of new Asian immigrants for financial educators, researchers, and policymakers. 相似文献
The ‘untouchables’ of India are excluded from various areas of social and cultural life. Despite this, the higher castes do not exclude them from the category of ‘Hindu’ since, for them, the term is counterposed to the concept of ‘foreigner’. The lowest groups, on the other hand, often do not think of themselves as Hindus, for they use the word in terms of a very different set of conceptual oppositions. For them, ‘Hindus’ are people of high caste. Anderson's (1983) characterization of the nation as an ‘imagined community’ does not adequately explain why Hindu nationalists are now pressing minority ‘untouchables’ to define themselves as Hindus. Western reification of the concept of ‘Hindu’ has implications for political struggles in the sub‐continent. 相似文献
A dataset consisting of salaries of major league baseball players is published at the start of each season in USA Today, and is also made available on the Internet. It is argued that such an easily available dataset and those similar to it can be successfully used by students in a first statistics course for an interesting introduction to data analysis through summary measures and graphical displays. Such an approach is most natural for many students because of a strong interest in sports and economics. Other statistical ideas can be explored as a natural consequence of the discussions that ensue from such an analysis. 相似文献