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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

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

From Science Daily • May 19, 2026

Restaurant tipping rates decreased by 0.05% on weekends when box-office revenue was one standard deviation higher than average.

From The Wall Street Journal • May 9, 2026

The standard deviation of targets for the other Magnificent Seven stock ranges from 10% to 16%.

From Barron's • May 4, 2026

No other breed falls outside the standard deviation.

From "The Miscalculations of Lightning Girl" by Stacy McAnulty