to or at a source, origin, center, or the like: to follow a stream up to its source. 7. to or at a higher point or degree, as of rank, size, value, pitch, loudness, brightness, maturity, or speed: to move up in a firm; to pump up a tire; to turn a lantern up; Prices are going up.
What is 'Standard Deviation'. Standard deviation is a measure of the dispersion of a set of data from its mean. If the data points are further from the mean, there is higher deviation within the data set. Standard deviation is calculated as the square root of variance by determining the variation between each data point relative to the mean.
Because the definition of standard deviation is, essentially, the Mean distance the data points are from the arithmatic mean of the set. So a set of (2,4,6) has an arithmatic mean of 4, and a standard deviation of 1 1/3 ((|2-4|+|4-4|+|6-4|)/3).