Noun | 1. | standard deviation - the square root of the variance |

(statistics) | standard deviation - (SD) A measure of the range of values in a set of
numbers. Standard deviation is a statistic used as a measure
of the dispersion or variation in a distribution, equal to the
square root of the arithmetic mean of the squares of the
deviations from the arithmetic mean.The standard deviation of a random variable or list of numbers (the lowercase greek sigma) is the square of the variance. The standard deviation of the list x1, x2, x3...xn is given by the formula: sigma = sqrt(((x1-(avg(x)))^2 + (x1-(avg(x)))^2 + ... + (xn(avg(x)))^2)/n) The formula is used when all of the values in the population are known. If the values x1...xn are a random sample chosen from the population, then the sample Standard Deviation is calculated with same formula, except that (n-1) is used as the denominator. [dictionary.com]. ["Barrons Dictionary of Mathematical Terms, second edition"]. |

Browse

stand watch

stand-alone

Stand-by

stand-down

stand-in

stand-up

Standage

Standard

Standard and Poor's

Standard and Poor's Index

standard atmosphere

Standard bearer

standard candle

standard cell

Standard Commands for Programmable Instruments

Standard d'Echange et de Transfert

**-- standard deviation --**

standard for robot exclusion

Standard for the exchange of product model data

standard gauge

Standard Generalised Markup Language

standard generalized markup language

standard I/O

standard input/output

Standard Instrument Control Library

standard interpretation

Standard Lisp

Standard ML

Standard ML of New Jersey

standard of life

standard of living

standard of measurement

standard operating procedure

stand-alone

Stand-by

stand-down

stand-in

stand-up

Standage

Standard

Standard and Poor's

Standard and Poor's Index

standard atmosphere

Standard bearer

standard candle

standard cell

Standard Commands for Programmable Instruments

Standard d'Echange et de Transfert

standard for robot exclusion

Standard for the exchange of product model data

standard gauge

Standard Generalised Markup Language

standard generalized markup language

standard I/O

standard input/output

Standard Instrument Control Library

standard interpretation

Standard Lisp

Standard ML

Standard ML of New Jersey

standard of life

standard of living

standard of measurement

standard operating procedure