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What does SD stand for?

SD stands for Standard Deviation

This definition appears very frequently

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We have 158 other meanings of SD in our Acronym Attic

Samples in periodicals archive:

Those participants that initially had a low standard deviation also showed some improvement in repeatability, with their standard deviations decreasing by 11-16%.
The interval between the upper and lower bands and the middle band is determined by volatility, typically the standard deviation of the same data that were used for the average.
Any gain is welcome, but an increase of a third of a standard deviation does not qualitatively change a student's life chances.
r] is the standard deviation calculated according to ASTM E 74-04 from the differences between the individual measured responses and the corresponding responses computed from Eq.