standard deviation

Definitions

General Science

  • noun a measure of the amount by which a set of values differs from the

    arithmetic mean

Banking

  • noun the way in which the results of a sample

    deviate

    from the mean or average

Construction

  • A statistic, used as a measure of

    dispersion

    in a distribution, that is equal to the square root of the arithmetic average of the squares of the deviations from the mean.

Economics

  • noun the measure of how much a variable changes from its mean

Electronics

  • A statistical measure of the

    dispersion

    or spread around the mean, for a given set, series, or

    population

    . It is

    equal

    to the square root of the variance. If a

    data set

    has as a bell-shaped distribution, for instance, 68.3% of the

    data

    will fall on either side of one standard deviation,

    95

    .5% within two standard deviation, 99.7% within three, and so on. Its abbreviation is SD. Its

    symbol

    is σ.

Health Economics

  • (written as Standard Deviation)
    The standard deviation (SD) is measure of the dispersion of a set of numbers around the mean value of a variable. It is the square root of the variance. A large value of SD implies a large dispersion about the mean and vice versa.

Information & Library Science

  • noun a statistical term to show how far things are different from the normal
http://www.dictionarycentral.com/definition/standard-deviation.html