Letter to the Editor: Fitting a folded normal distribution without EM

2020 ◽  
Vol 14 (4) ◽  
pp. 2096-2098
Author(s):  
Iain L. MacDonald
2021 ◽  
pp. 111-122
Author(s):  
Степан Алексеевич Рогонов ◽  
Илья Сергеевич Солдатенко

Анализ поведения случайных величин после различных преобразований можно применять при решении многих нетривиальных задач. В частности, решения, которые невозможно выразить аналитически, с точки зрения практической применимости способны давать результаты с точностью, достаточной для вычислений, вынося невыразимую невязку аналитического решения далеко за рамки требуемой погрешности. В настоящей работе исследовано поведение модуля нормально распределенной случайной величины и выяснено, при каких условиях можно пренебречь операцией взятия абсолютного значения и аппроксимировать модуль случайной величины {\it похожим} распределением вероятностей. The analysis of the behavior of random variables after various transformations can be used in the practical solution of many non-trivial problems. In particular, solutions that cannot be expressed purely analytically, from the point of view of practical applicability, are able to give results with accuracy sufficient for real calculations, taking the inexpressible discrepancy of the analytical solution far beyond the actual error. In this paper, the behavior of the modulus of a normally distributed random variable is investigated and it is found out under what conditions it is possible to neglect the operation of taking an absolute value and approximate the modulus of a random variable with a {\it similar} probability distribution.


PEDIATRICS ◽  
1974 ◽  
Vol 54 (2) ◽  
pp. 255-255
Author(s):  
Marcel Kinsbourne

Dr. Wender adapts the disease approach to school problems. The trouble with this is that one might omit first to ask whether the child is hungry, sad or poorly taught. It makes little sense to speak of specific learning disability (SLD) with deprived children. Our very tests for SLD are meaningless for them. As to whether SLD children constitute a segment of the normal distribution of abilities, we don't know, and, for predictive purposes it does not matter.


2020 ◽  
Vol 14 (4) ◽  
pp. 2099-2100
Author(s):  
Sungkyu Jung ◽  
Mark Foskey ◽  
J. S. Marron

Sankhya B ◽  
2013 ◽  
Vol 75 (1) ◽  
pp. 1-15 ◽  
Author(s):  
Ashis Kumar Chakraborty ◽  
Moutushi Chatterjee

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