But neither of these factors came close to explaining the variation in class performance.
Accuracy results are reported for 10 geographic regions of the United States, with regional overall accuracies ranging from 68%to86%6% for Level II and from 79%to91%1% at Level I. Geographic variation in class-specific accuracy was strongly associated with the phenomenon that regionally more abundant land-cover classes had higher accuracy.
While variation in class size may yield insight into the effectiveness of punishment, instructors may also be interested in performing inter-group experiments within a single class.
Using quasi-experimental variation in class size, a recent study estimates studentand parental response to class size in grades 4-6 (Fredriksson P, Öckert N,Oosterbeek H: Inside the black box of class size effects: Behavioral responses toclass size variation, unpublished).
Gridcodes not assigned into a habitat class by the automated labeling procedure described above were therefore subsequently labeled in a manual, interpretive process which considered gridcode similarity (i.e., variation in class values in input variables), and in particular, similarity in land cover types.
Fredriksson et al. 2013, using very rich data from Sweden and the exogenous variation in class size induced by a maximum class size rule, show that reducing class size by one pupil during the final three years of primary school increases years of schooling by only 0.05 years (or two-thirds of a month).
Take this variation in class and dance it double time while everyone else stays on the beat with me.
The association between genetic variation in class I HLA and the susceptibility, presentation, and outcome of infectious diseases in East Africa, and the development of preventive vaccines, are topics of high public health relevance.
Yet this metric can account for a large portion of the variation in class grade.
Class II transcripts were inversely correlated with CG-137 methylation (R = −0.67; P = 7 × 10−8), which accounted for 45% of the variation in class II transcripts in PBMC.
