atypical vs unrepresentative

atypical and unrepresentative both are adjectives.

Word	Noun	Adjective	Verb	Adverb
atypical	No	Yes	No	No
unrepresentative	No	Yes	No	No

atypical (adjective)	unrepresentative (adjective)
not representative of a group, class, or type	not exemplifying a class
deviating from normal expectations; somewhat odd, strange, or abnormal