Plus–minus sign - Wikipedia In statistics and experimental sciences, the ± sign commonly indicates the confidence interval or uncertainty bounding a range of possible errors in a measurement, often the standard deviation or standard error The sign may also represent an inclusive range of values that a reading might have
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Sign Definition Meaning | Britannica Dictionary number sign (noun) peace sign (noun) plus sign (noun) pound sign (noun) road sign (noun) star sign (noun) times sign (noun) vital signs (noun) V sign (noun) time (noun) 1 sign ˈ saɪn noun plural signs Britannica Dictionary definition of SIGN [count] 1 : a piece of paper, wood, etc , with words or pictures on it that gives information about