Specifically, a systematic review of instrumental variable analysis showed that such analyses often result in wider confidence intervals than traditional methods, which means that the estimates of treatment effect are likely less precise, and therefore less likely to be statistically significant [47]. ...
researchers can plan to eliminate or include extraneous variables in an experiment. Control by elimination means that experimenters remove the suspected extraneous variables by holding them constant across all experimental conditions. In the treatments-effect study described earlier, researchers examined the ...
aIn celtic language, Cornas means "burnt land" which somehow describe easily what Cornas wine is about. 在凯尔特语的语言,容易地莫名其妙地描述的Cornas手段“被烧的土地”什么Cornas酒。 [translate] asame here. I just log in few days ago... 这里同样。 我登录少量天前… [translate] aThis is ...
Two research questions arise: (i) how much faster the global design optimization of antenna structures may be carried out using variable-resolution EM models than the procedure executed in a single-fidelity regime, and (ii) to what degree the design quality is going to deteriorate with respect ...
In this paper, I show how the coefficient for the product variable in these models depends on the causal mechanism that underlies the interaction effect. I also show that different causal mechanisms can imply the same estimation equation, which means that one cannot determine the causal mechanism ...
The tri-mean proposed by47, the Hodges-Lehmann estimator proposed by48 and the decile means proposed by49 are the three robust metrics we used in this study. For further information about these robust measures, readers can see50 and51 for details. Motivated by52, we develop a neutrosophic ...
The present article develops a conceptual approach in which no violence is done to historical or empirical fact, but which offers a means of integrating the concept of state into the current primacy of social science concerns and analytical methods. It is hoped that this approach not only will ...
The modern optimization design leads to the widespread use of periodic variable cross-section beam in engineering practice,and the stiffness analysis of periodic variable cross-section beam is now a hot research issues of the engineers. In this investigation,the homogenization method and Timoshenko beam...
The Association-Oriented Research Strategy Glenn M.HymelEdD, LMT, inResearch Methods for Massage and Holistic Therapies, 2006 Measures. The social and demographicpredictor variablesof age, gender, living situation, marital status, and educational level were gathered by the research therapists during the...
variables. By means of two simulation studies with various noise and sparseness levels in simulated data, we compare six variable selection methods, which are cross-validation (CV) with the “one-standard-error” rule, repeated double CV (rdCV), BIC, Bolasso with CV, stability selection, and...