نتایج جستجو برای: sample variance
تعداد نتایج: 498107 فیلتر نتایج به سال:
Power analysis and sample size estimation are critical steps in the design of clinical trials. Usually, these tasks can be accomplished by a statistician by using estimates of the treatment effect and sample variance from past trials or expert opinion. However, when exact power computations or reasonable approximations are not possible, or when there is no method to estimate the effect size or ...
the purpose of this study was to investigate the relationship between teachers’ class management practices with students’ self- regulated learning and academic self-efficacy. in this study relating to the management class, three dimensions, (training management, people management and behavior management) and three style (interventionist, interactionist and non-interventionist) was considered. r...
OBJECTIVES To investigate the extent to which cluster sizes vary in stepped-wedge cluster randomised trials (SW-CRT) and whether any variability is accounted for during the sample size calculation and analysis of these trials. SETTING Any, not limited to healthcare settings. PARTICIPANTS Any taking part in an SW-CRT published up to March 2016. PRIMARY AND SECONDARY OUTCOME MEASURES The pr...
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