Statistical calculation (4)

I think it could be either:

Which length description are you looking for?:

mode

'statistical calculation' is the definition.
(I've seen this in another clue)

This is the entire clue.

(Other definitions for mode that I've seen before include "Fashion in dome" , "Custom" , "Manner, style" , "Fashion; manner" , "Fashion; way of performing" .)

I've seen this clue in The Wall Street Journal.

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