class mark

American  

noun

Statistics.

1. the midpoint of a class interval.

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class mark British  

noun

1. statistics a value within a class interval, esp its midpoint or the nearest integral value, used to represent the interval for computational convenience

2. Also called: class number.  library science a symbol on a book or other publication indicating its subject field, shelf position, etc

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Etymology

Origin of class mark

1885–90, for an earlier sense