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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.

On weekends with low box-office returns—defined as one standard deviation below normal—tipping rates were 20.61%.

From The Wall Street Journal • May 9, 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 average analyst price target on Bloomberg is about $408, with a 35% standard deviation, he added.

From Barron's • May 4, 2026

And yet the VIX finished Friday above 27, a level that is roughly one standard deviation above the index’s long-term average.

From MarketWatch • Mar. 14, 2026

No other breed falls outside the standard deviation.

From "The Miscalculations of Lightning Girl" by Stacy McAnulty