statistics, the standard deviation is a measure of the amount of variation of a random variable expected about its mean. A low standard deviation indicates...

preferred to the more usual standard deviation. Note that unlike the usual arithmetic standard deviation, the geometric standard deviation is a multiplicative...

also known as normalized root-mean-square deviation (NRMSD), percent RMS, and relative standard deviation (RSD), is a standardized measure of dispersion...

Look up standard deviation in Wiktionary, the free dictionary. Standard deviation is a widely used measure of variability or diversity used in statistics...

unbiased estimation of a standard deviation is the calculation from a statistical sample of an estimated value of the standard deviation (a measure of statistical...

The standard error (SE) of a statistic (usually an estimate of a parameter) is the standard deviation of its sampling distribution or an estimate of that...

In statistics, the standard score is the number of standard deviations by which the value of a raw score (i.e., an observed value or data point) is above...

statistics, the standard deviation line (or SD line) marks points on a scatter plot that are an equal number of standard deviations away from the average...

random variable. Its expected value and standard deviation are related to the expected values and standard deviations of the observations, as follows. For...

known as a pooled standard deviation (also known as combined standard deviation, composite standard deviation, or overall standard deviation). In statistics...