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Bias-Corrected Root Mean Square Deviation Estimators

open access: yesFoundations
The root mean square deviation (RMSD) is a widely used item fit statistic in item response models. However, the sample RMSD is known to exhibit positive bias in small samples. To address this, seven alternative bias-corrected RMSD estimators are proposed
Alexander Robitzsch
doaj   +2 more sources

A novel extended Gumbel Type II model with statistical inference and Covid-19 applications

open access: yesResults in Physics, 2022
Statistical models play an important role in data analysis, and statisticians are constantly looking for new or relatively new statistical models to fit data sets across a wide range of fields.
Showkat Ahmad Lone   +3 more
doaj   +1 more source

Neutron optical test of completeness of quantum root-mean-square errors

open access: yesnpj Quantum Information, 2021
While in classical mechanics the mean error of a measurement is solely caused by the measuring process (or device), in quantum mechanics the operator-based nature of quantum measurements has to be considered in the error measure as well. One of the major
Stephan Sponar   +3 more
doaj   +1 more source

Elastic Rough Surface Contact and the Root Mean Square Slope of Measured Surfaces over Multiple Scales

open access: yesFractal and Fractional, 2021
This study investigates the predictions of the real contact area for perfectly elastic rough surfaces using a boundary element method (BEM). Sample surface measurements were used in the BEM to predict the real contact area as a function of load.
R. Jackson, Yang Xu, S. Saha, K. Schulze
semanticscholar   +1 more source

Soundness and completeness of quantum root-mean-square errors [PDF]

open access: yesnpj Quantum Information, 2018
Defining and measuring the error of a measurement is one of the most fundamental activities in experimental science. However, quantum theory shows a peculiar difficulty in extending the classical notion of root-mean-square (rms) error to quantum ...
M. Ozawa
semanticscholar   +1 more source

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