statistical

from WordNet (r) 3.0 (2006)

statistical
    adj 1: of or relating to statistics; "statistical population"

from The Collaborative International Dictionary of English v.0.48

Statistic \Sta*tis"tic\ (st[.a]*t[i^]s"t[i^]k), Statistical
\Sta*tis"tic*al\ (-t[i^]*kal), a. [Cf. F. statistique.]
   Of or pertaining to statistics; as, statistical knowledge;
   statistical tabulation.
   [1913 Webster]