norm

nouns

a standard or model or pattern regarded as typical
"the current middle-class norm of two children per family"
norm
is a type of (narrower)
a basis for comparison; a reference point against which other things can be evaluated
"the schools comply with federal standards"; "they set the measure for all subsequent work"
criterion, measure, standard, touchstone
a statistic describing the location of a distribution
"it set the norm for American homes"
average, norm