Unrepresentative
[,ʌnreprɪ'zentətɪv] or [,ʌn,rɛprɪ'zɛntətɪv]
Definition
(adj.) not exemplifying a class; 'I soon tumbled to the fact that my weekends were atypical'; 'behavior quite unrepresentative (or atypical) of the profession' .
Edited by Amber--From WordNet