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Cognitive domain scores will be calculated on the basis of sum of z-scores of index tests, referenced to whole-group baseline results.
Next, we use data simulation to illustrate the potentially huge bias in estimating variance components on the basis of sum scores.
Lastly, a simulation study shows the potential bias when estimating variance components on the basis of sum scores and the Bayesian method is illustrated with an empirical data set on attention problems.
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(c) Daily relative humidity calculated on the basis of summing hourly absolute humidity (RH') as a function of daily average relative humidity for the period 1949 2010.
CTFFIND4 (Rohou and Grigorieff, 2015) was used to estimate the contrast transfer function (CTF) parameters and produce the CTF power spectrum on basis of summed micrographs from MOTIONCORR2.
One-way ANOVA statistical F-tests, coefficients of multiple determination (R and R adjusted) and fitting root-mean-square error (RMSEF) were calculated on the basis of total, model and error sum of squares (SS) resulting from the distances illustrated in Figure 9.
Model calculations were performed for a range of metal/oxide systems (oxidation of Al, Ni, Cu, Cr, Fe, Mg, Zr and Ti) on the basis of the sum of the surface, interfacial and bulk energy differences between the competing amorphous and crystalline oxide overgrowths on the same metal substrate.
To highlight this pattern, we sort the matrix with the following criterion: fixing the top-left corner of the matrix M as the origin, we sort the customers on the basis of the sum of the items purchased in descending order (the top buying customer at the first row and so on), and the products with the same criteria from left to right (the best seller product at the first column and so on).
This is important for the use of these scales in applied research, because it suggests that group mean differences in these scales are hardly confounded by structural differences when calculated on the basis of raw sum scores and by using methods that cannot account for DIF, such as ANOVA.
These two sets of samples were chosen on the basis of the sum of all contaminants.
The number of dimensions was decided on basis of the sum of the Eigenvalues of the dimensions.
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Since I tried Ludwig back in 2017, I have been constantly using it in both editing and translation. Ever since, I suggest it to my translators at ProSciEditing.

Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com