S: (adj) average, mean (approximating the statistical norm or average or expected value) "the average income in New England is below that of the nation"; "of average height for his age"; "the mean annual rainfall"
S: (adj) average, ordinary (lacking special distinction, rank, or status; commonly encountered) "average people"; "the ordinary (or common) man in the street"
S: (adj) average, fair, mediocre, middling (lacking exceptional quality or ability) "a novel of average merit"; "only a fair performance of the sonata"; "in fair health"; "the caliber of the students has gone from mediocre to above average"; "the performance was middling at best"
S: (adj) average, intermediate, medium (around the middle of a scale of evaluation) "an orange of average size"; "intermediate capacity"; "medium bombers"
S: (adj) modal, average (relating to or constituting the most frequent value in a distribution) "the modal age at which American novelists reach their peak is 30"
S: (adj) median, average (relating to or constituting the middle value of an ordered set of values (or the average of the middle two in a set with an even number of values)) "the median value of 17, 20, and 36 is 20"; "the median income for the year was $15,000"