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21.
Peer Bilal Ahmad 《统计学通讯:理论与方法》2013,42(12):3612-3624
ABSTRACTIn this paper, we derive the Bayes estimators of functions of parameters of the size-biased generalized power series distribution under squared error loss function and weighted square error loss function. The results of size-biased GPSD are then used to obtain particular cases of the size-biased negative binomial, size-biased logarithmic series, and size-biased Poisson distributions. These estimators are better than the classical minimum variance unbiased estimators in the sense that they increase the range of the estimation. Finally, an example is provided to illustrate the results and a goodness of fit test is done using the maximum likelihood and Bayes estimators. 相似文献
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Environmental scanning is a broadly defined concept, having first received attention from scholars in the late 1960s. Over the years a number of similar and overlapping constructs have emerged in management literature. The aim of this study, via a systematic review and thematic analysis of relevant empirical research, is to consolidate foundation environmental scanning knowledge, demonstrate how scanning research has developed and fragmented over time, and propose an agenda for future research. The first contribution of our review is a new typology of environmental scanning research made up of five discrete research views, which provides a more comprehensive and contemporary overview of the field than previous studies. The second is a proposed agenda for future research that explicitly acknowledges the role of technology, an area that is presently underdeveloped in foundation scanning literature. The third contribution is to signpost future directions for research on scanning and organisational performance using a number of theoretical perspectives. The overall outcome of our review is to move scanning research on from increasingly incremental contributions concerned with context to a place where the changing role of technology and the mechanisms through which environmental scanning contributes to competitive advantage can be more thoroughly understood. 相似文献
24.
Shahab E. Saqib Mokbul Morshed Ahmad Carmen Amezcua-Prieto 《The Social Science Journal》2018,55(3):313-322
Despite the availability of free medicines under the Directly Observed Treatment Short-course (DOTS) strategy, the treatment of tuberculosis (TB) still involves high costs that push people into poverty. This study aims to assess the resulting economic burden of TB and examine the coping mechanisms practiced at the household level in Pakistan. A cross-sectional study was conducted at TB centers by interviewing 269 patients. Statistical tests and binary logistic regression were used to explore the relationship between catastrophic health expenditures (CHE) and socio-economic factors. Results show that the incidence and intensity of CHE were higher for households in the lower income-quintile. Several coping strategies were practiced and varied among the different income-quintiles. The independent determinants of CHE were as follows: age >40 years, male-patient, location, earner-ratio, patient as the earner, caretaker visits, treatment delay, and co-morbidity. It is recommended that health policymakers develop post-MDGs TB-control strategies to ensure free TB-services with financial protection around the globe. 相似文献
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M. Rauf Ahmad 《Journal of Statistical Computation and Simulation》2019,89(6):1044-1059
ABSTRACTMultiple comparisons for two or more mean vectors are considered when the dimension of the vectors may exceed the sample size, the design may be unbalanced, populations need not be normal, and the true covariance matrices may be unequal. Pairwise comparisons, including comparisons with a control, and their linear combinations are considered. Under fairly general conditions, the asymptotic multivariate distribution of the vector of test statistics is derived whose quantiles can be used in multiple testing. Simulations are used to show the accuracy of the tests. Real data applications are also demonstrated. 相似文献
27.
Ibrahim A. Ahmad & Ibrahim A. Alwasel 《Journal of the Royal Statistical Society. Series B, Statistical methodology》1999,61(3):681-689
In this investigation a test of goodness of fit for exponentiality is proposed. This procedure applies equally whether the scale and/or the location parameters of the distribution are known or not. The limiting null and non-null distributions of the test statistic are normal under minimal conditions. Monte Carlo critical values for small sample sizes are given and the power of the test is calculated for various alternatives showing that it compares favourably relatively to other more complicated published procedures. 相似文献
28.
This article proposes a new mixed variable lot-size multiple dependent state sampling plan in which the attribute sampling plan can be used in the first stage and the variables multiple dependent state sampling plan based on the process capability index will be used in the second stage for the inspection of measurable quality characteristics. The proposed mixed plan is developed for both symmetric and asymmetric fraction non conforming. The optimal plan parameters can be determined by considering the satisfaction levels of the producer and the consumer simultaneously at an acceptable quality level and a limiting quality level, respectively. The performance of the proposed plan over the mixed single sampling plan based on Cpk and the mixed variable lot size plan based on Cpk with respect to the average sample number is also investigated. Tables are constructed for easy selection of plan parameters for both symmetric and asymmetric fraction non conforming and real world examples are also given for the illustration and practical implementation of the proposed mixed variable lot-size plan. 相似文献
29.
Transnational caregiving can be daunting, yet it often brings out the strengths of the caregiver that he or she may not have been aware of. Thus, it is a wonderful opportunity to know oneself and use those strengths to become better in other areas of life. Transnational caregiving is also a blessing, in that one can still continue to provide care for a loved one by surmounting the barriers of geographical distance. To transform what often is a challenging situation into a blessing, a fresh eye is needed to seek different ways of fulfilling the needs of the loved one by focusing on one thing: How can the caregiver, in his or her individual capacity, make a difference in the quality of life of the family member? This article, while relating personal experience in caring for a parent, traverses these issues. 相似文献
30.
Mehrunnisa Ahmad Ali 《Intercultural Education》2013,24(5):417-429
This study examined how Muslims living in the West were represented in English language textbooks in Ontario, Canada. The review showed that Muslims were consistently placed in inferior and dependent positions in relation to ‘white folks’ by focusing on their origins in violent and backward societies, their cultural deficits, social ineptitudes, conflicted identities, and low-status jobs. It is suggested that textbooks should encourage critical literacy by including a wider, more accurate range of depictions of Muslims in western societies to combat stereotyping. 相似文献