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# Standard-deviation

noun, Statistics.
1.
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.
standard deviation
noun
1.
(statistics) a measure of dispersion obtained by extracting the square root of the mean of the squared deviations of the observed values from their mean in a frequency distribution

standard deviation n.
Symbol σ
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.
standard deviation
(stān’dərd)
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.

standard deviation definition

In statistics, a measure of how much the data in a certain collection are scattered around the mean. A low standard deviation means that the data are tightly clustered; a high standard deviation means that they are widely scattered.

Note: About sixty-eight percent of the data are within one standard deviation of the mean.

Tagged:

• Standard-dollar

noun 1. the basic monetary unit of the U.S., since January 31, 1934, containing 15.2 grains of gold, 0.900 fine: previously contained 25.8 grains of gold, 0.900 fine.

• Standard-english

noun 1. the English language in its most widely accepted form, as written and spoken by educated people in both formal and informal contexts, having universal currency while incorporating regional differences.

• Standard-error

noun, Statistics. 1. the standard deviation of a distribution of a sample statistic, especially when the mean is used as the statistic. standard error noun 1. (statistics) the estimated standard deviation of a parameter, the value of which is not known exactly standard error The standard deviations of the sample in a frequency distribution, obtained […]

• Standard error of difference

standard error of difference n. A statistical index of the probability that a difference between the statistical means of two samples is greater than zero.

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