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However, minimal change in the condyle-disk-fossa position was observed in the control sample of class II division 1 malocclusion over a period of 6 months.
Where x i j is the i th sample of class j, μ j is the mean of class j, c is the number of classes, and N j is the number of samples in class j.
(2) After feature extraction, the N training samples A = [A1, A2, …, A7] are collected for seven color classes, in which A i = a i, 1, a i, 2,...., a i, n i ∈ R d × n i is the sample of class i and N = ∑ i = 1 7 n i.
To overcome common methodological errors seen in orthodontic literature and to eliminate susceptibility bias, it was decided to obtain a borderline sample in regard to extractions that derived from a large parent sample of class I patients of a previous investigation [23].
where N i is the training sample size of class i, x k i is the k th sample of class i, M j ( x k i ) denotes the weighted mean corresponding to x k i for class j, and dist x, y) is the distance measured from x to y.
The aim of this study was to identify the percentage of cases treated with four first premolar extractions in a large sample of Class I patients and to suggest which of the orthodontic measurements are the most important in leading an orthodontist to his treatment decision.
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The data are based on a stratified random sample of classes of 8th graders of the 2011/12 school year within German-speaking Switzerland (for details, see (Glauser 2015), 125 132).
In the second step, a systematic sample of classes in the selected schools was obtained.
A stratified cluster sample of classes offered in the spring semester of the 2008/2009 academic year was selected.
The selection of classes was based on a stratified cluster design whereby a proportionate sample of classes was chosen from all six faculties based on the size of each faculty.
A random sample of classes being offered in the spring semester of academic year 2008/2009 was selected to recruit participants; a total of 545 students were registered in those classes.
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