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951.
952.
TESTING THE LARGEST OF A SET OF CORRELATION COEFFICIENTS 总被引:1,自引:0,他引:1
P. A. P. Moran 《Australian & New Zealand Journal of Statistics》1980,22(3):289-297
A previous paper which studied the distribution of the smallest distance between N independent random points on the surface of a sphere is generalised to higher dimensions in order to study the distribution of the largest sample correlation coefficient between a set of independent normally distributed variables. Inclusion-exclusion arguments provide accurate bounds for the tail of this distribution, and by another argument more exact bounds are also found, one of which is an improvement on the result in the previous paper. Bounds are also found for the power of the test against the alternative hypothesis that one only of the population correlation coefficients is non-zero. The test is also shown to be the likelihood ratio test against the latter alternative. 相似文献
953.
While effective communication is recognized as important to marital adjustment, few therapeutic alternatives specifically attempt to teach improved communication skills in a systematic manner. In this study, five couples experiencing marital difficulties participated in a traditional therapy group with emphasis upon cathartic release and problem solving. A similar group of five couples participated in a training group consisting of a systematic didactic and experiential approach emphasizing the ability to discriminate and communicate helpfully. The results of outcome measures assessing gain in interpersonal skills and overall functioning indicate significant improvement in the training as compared to the traditional group. 相似文献
954.
955.
In repeated sampling enquiries application of method of successive sampling with partial replacement of units is advantageous. In this paper use of successive sampling technique when the sampling design is multi-stage has been studied. Estimates of population mean and its variance have been obtained (a) on the second occasion, and (b) on the h-th occasion under two systems of replacement, namely (i) by retaining only a fraction p of psu's along with their sample of ssu's, and (ii) by retaining all the psu's on the second occasion, but from each psu only a fraction p of the ssu's within them is retained. A cost function suitable to the design has been illustrated, with the help of data collected from a sample survey conducted by the Indian Council of Agricultural Research. 相似文献
956.
Summary Using four detailed and complex simulation models we derive a framework for predicting behavior of any defoliating insect/forest
system. The framework uses simple and easily gathered biological information on four sets of state variables, each with a
characteristic temporal scale, to predict presence, absence or form of key ecological processes acting on or between the variables.
The combination of these key processes enables prediction of system equilibrium structure and this structure can be used to
derive the temporal behavior of the system. Four qualitatively different classes of system behavior arise from the equilibrium
structures.
The framework is tested against twelve other systems and field invalidation experiments are outlined. Forest defoliator research
and management implications are discussed. 相似文献
957.
Based upon research in an alcoholism treatment organization, the study explores the impact of interdisciplinary team treatment on organizational participants and structure. The findings suggest that alternate organizational arrangements are necessary for organizations which use the team method. The implications of team treatment for professionals were confounded because of power relationships within the organization. Role bargaining between professionals was observed to be virtually non-existent because of the dominance of a single discipline. A surprising finding was the extent to which supervisory personnel were disadvantaged in the study. Caution is suggested for those organizations most likely to adopt the team method, large public health organizations. 相似文献
958.
959.
The existing empirical literature on the outcomes of marital and pre-marital enrichment programs is critically reviewed. While the majority of studies have used untreated control groups and appear to offer very striking evidence of meaningful change as a result of these enrichment experiences, several important methodological deficiencies are common to these investigations and, therefore, require a cautious optimism about the efficacy of these programs. Six specific issues are addressed in an effort to improve the quality and utility of further research and practice in this area. 相似文献
960.