Standard Deviation (SD)

A metric used in statistics to express how much a given value tends to deviate from the distribution's mean. The square root of the variance is used to calculate the standard deviation, a statistic that expresses how widely distributed a dataset is in relation to its mean. By calculating each data point's divergence from the mean, the standard deviation may be determined as the square root of variance. In simpler terms, a standard deviation is a measurement of how distant the data is from the mean. A low standard deviation suggests that data are concentrated around the mean, whereas a large standard deviation shows that data are more dispersed.