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.
One standard deviation of a normal distribution contains 66.67% of all data in a particular data set. Therefore, any single datum in the data has a 66.67% chance of falling within one standard deviation from the mean. 95% of all data in the data set will fall within two standard deviations of the mean.