A statistical measure of the variability of a distribution around its mean. It is the square root of the variance.
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A common measure of the dispersion of a random variable or of a sample of data. Defined as the square root of the variance.
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A statistic used to measure dispersion equal to the square root of the arithmetic mean of the squares of the deviations from the arithmetic mean.
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A measure of accuracy or precision, calculated as the square root of the variance.
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A descriptive statistic used to measure the degree of variability within a set of scores
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A measure of the spread of a set of data. For a Gaussian distribution, the standard deviation hints at the width of the tails of the distribution function.
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A statistical measure of the dispersion of a set of numbers around a central point. If the standard deviation is small, the frequency of distribution is concentrated within a narrow range of values. For a 'normal' distribution, about two thirds of the observations will fall within one standard deviation of the mean. Standard deviation is a commonly...
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, SD, is a measure of how far a set of observed values spread on either side of their mean. Eg the set of five values 79, 89, 100, 111, 121 has mean 100, and the SD is calculated to be 15. The SD calculation depends on differences of the values from the mean eg 79 and 89 are roughly 15 below 100, and 111 and 121 are roughly 15 above. See normal dis...
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(SD) the dispersion of a random variable; a measure of the amount by which each value deviates from the mean. It is equal to the square root of the variance. For data that have a normal distribution, about 68 per cent of the data points fall within (plus or minus) one standard deviation from the mean and abo...
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A measure of dispersion of a frequency distribution
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A statistic used as a measure of the dispersion or variation in a distribution, equal to the square
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A measure of a fund's volatility derived by looking at its range of historical returns. The higher the standard deviation, the greater the potential for volatility. Say a fund has an average annual return of 12% and a standard deviation of 20. By adding and subtracting 20 from 12, you can figure what the fund's high and low returns have been in two......
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A statistical measure of variability from the mean. To calculate it, find the difference of each and every score from the mean, square each difference, average them, then take the square root. For IQ tests, the mean is designed to be 100, and the standard deviation is calculated to be about 15 or 16. See intelligence quotient, norm, normally distributed....
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(Learning Modules / Psychology / Measuring the unmeasurable) A measure of spread within a distribution (the square root of the variance). The most popular and most reliable measure of variability but the more skewed a distribution, the more error there will be in the standard deviation because of its reliance on the mean.
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A statistical measure of price fluctuation. One use of the standard deviation is to measure how... <a target=_blank href='http://www.finance-glossary.com/terms/standard-deviation.htm?id=2252&ginPtrCode=00000&PopupMode=false' title='Read full definition of standard deviation'>more</a>
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(SD, σ) Type: Term Definitions: 1. statistical index of the degree of deviation from central tendency, namely, of the variability within a distribution; the square root of the average of the squared deviations from the mean. 2. a measure of dispersion or variation used to describe a characteristic of a frequency distribution. ...
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A statistical measure of the recent range of prices of a metal which serves as a basis for assessing its current level of volatility.
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A statistical measure of the dispersion of observation values in a data set. Calculated by determining the square root of the variance.
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A measure of dispersion of a frequency distribution.
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A Statistic that shows the spread or dispersion of scores in a distribution of scores. in other words, a measure of dispersion. The more widely the scores are spread out, the greater the standard deviation. the standard deviation is the square root of the variance. For example: imagine trued groups of patients. In one CD4 cell counts range from 310...
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noun the square root of the variance
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(SD) The average difference of a set of scores from their mean; a measure of variability.
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a measure of dispersion in a frequency distribution, equal to the square root of the mean of the squares of the deviations from the arithmetic mean of the distribution.
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A statistic that indicates the degree to which scores vary around the mean of a distribution.
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the square root of the variance
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