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Definitions

standard deviation

NOUN

predictable difference

Synonyms

WEAK

SD deviation normal deviation predictable error probable error range of error standard error

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

For purposes of calculating this strategy’s track record, a dip was defined as a drop of at least one standard deviation below the stock market’s trailing 12-month mean.

From MarketWatch • Jun. 24, 2026

Consider analyst estimates for Meta and their standard deviation, which measures how widely dispersed they are from the average.

From The Wall Street Journal • Jun. 18, 2026

Their final result brought theoretical predictions and experimental measurements into agreement within less than half a standard deviation.

From Science Daily • May 19, 2026

Tesla’s average analyst price target is $408 with a 35% standard deviation, implying wider outcomes than other tech giants.

From Barron's • May 4, 2026

No other breed falls outside the standard deviation.

From "The Miscalculations of Lightning Girl" by Stacy McAnulty