To prepare the gene expression matrix for further downstream analysis, we applied a KNN (k = 10) imputation to make sure an expression value existed for all genes in all samples [ 57].
41, 62 Several methods exist for comparing samples on the arrays, 63– 65 along with many different data analysis programs, techniques for normalization, quality control, quantifying spot intensity, and correcting for multiple tests.
It was concluded that nucleosome protection did not exist for degraded saliva samples, given that nuScores accurately represented the probability of finding a nucleosome.
Birth cohort studies are ideal because they represent a population of individuals, but prevalence and frequency statistics do exist for samples of individuals as well (e.g., Brame et al. 2004; Liu et al. 1997; Piquero and Buka 2002; Piquero et al. 2007).
While databases exist for generating larger samples such as LexisNexis which provides a commercial database of news content (available at http://www.lexisnexis.com), the analytical tools they provide are limited.
At present, this does not exist for nationally representative samples to allow comparison of areas within and between countries.
Current calibration methods that exist for passive sampling, including equilibrium extraction, linear uptake, and kinetic calibration, are presented in this review.
Length scales in which surface fractals are proved to be correct exist for each sample and range from 0.02 to 0.4 Å−1.
No rigid rules exist for determining sample size in a qualitative study.
