standard deviations

Statistical scatter metrics

Standard deviations is the plural of standard deviation, a statistical measure of how spread out values are from their average.

A low standard deviation means data points cluster tightly around the mean; a high one means they're scattered widely.

The phrase appears in scientific and social research: Test scores fell within two standard deviations of the mean.

In casual use, something several standard deviations from normal is dramatically unusual.

Related

margin of error · measurement · population mean · SEM · spread · sigma · dispersion · data points · bell curve · skewness · probability · normal distribution · sampling error · sample size · precision · quality control · calibration · square root

Opposites
central tendency vs. dispersion

standard deviationsmean

Average, or spiteful

average · arithmetic mean · central tendency · median · mode

variability vs. uniformity

standard deviationsuniformity

State of being identical

homogeneity · constant · invariance · consistency · regularity

Family

standard, deviation, standards, standardize, standardized, standardization, standardizing, deviate, deviated

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