unrepresentative

Từ điển Oxford Advanced Learner 8th

un·rep·re·sen·ta·tive [unrepresentative] BrE [ˌʌnˌreprɪˈzentətɪv] NAmE [ˌʌnˌreprɪˈzentətɪv] adjective ~ (of sb/sth)
not typical of a group of people or things and therefore not useful as a source of information about that group
Syn: ↑untypical
•an unrepresentative sample
•This early novel is unrepresentative of her work as a whole.
Opp: ↑representative