Epigenetic, the product of genetic and nongenetic influences. Multifactorial, traits affected by many factors, both genetic and environmental, that enhance, halt, shape,or alter the expression of genes, resulting in a phenotype that may differ markedly from the genotype.
What is 'Standard Deviation' Standard deviation is a measure of the dispersion of a set of data from its mean. It is calculated as the square root of variance by determining the variation between each data point relative to the mean. If the data points are further from the mean, there is higher deviation within the data set.
The standard deviation of the sample is an adequate descriptor when sample count rates are large compared to the background radiation but must be modified when counter background is not negligible, i.e ., for sample count rates which are in the vicinity of the background count rate.