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Part of the 53 % unexplained variance is likely to be random in the sense that it cannot be explained by systematic variance from independed variables.
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It depends on whether the analysis is limited by non systematic variance of the spectra, which is mainly due to the variance of normal surrounding tissue, or rather limited by detector noise.
Assuming that the analysis of the subtle spectral changes accompanying precancerous tissue (including chemometric techniques) is limited by the non systematic variance of the spectra, which is mainly due to the variance of normal surrounding tissue, minimization of signal contributions from surrounding tissue is important.
It was in the same range as the systematic variance induced by the error estimation technique itself during different cross-validation folds.
We found high correlation and low systematic variance between the two systems as evidenced by strong ICC values and acceptable limits of agreement from a Bland-Altman plot analysis.
This is best illustrated graphically where a non-systematic variance ranging from −11.1% till +12.9% is seen.
That is why Bengalis, incensed by systematic discrimination from Pakistan's Punjab dominated institutions, fought to create Bangladesh in 1971.
The ultimate sampling units were persons selected by systematic sampling from these 80 health centre districts.
The company poured a foundation for the new tower shortly before the deadline but only after angering area residents by obtaining a variance from the Buildings Department to work for two weeks from 6 a.m. to 9 p.m. and on weekends.
We estimated temporal environmental variance of the demographic rates by removing sampling variance from the total observed variance [43] [44].
In the cases where biases affected by systematic errors are adequately reduced, the variances of random errors estimated by WLL become roughly equal to the given one, but those estimated by WLSQ are much smaller than the given one.
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CEO of Professional Science Editing for Scientists @ prosciediting.com