With respect to, or by means of, inference

Of, pertaining to, or derived using inference.

(philosophy) Inferential role semantics: an approach to the theory of meaning that identifies the meaning of an expression with its (typically inferential) relationship to other expressions.

The quality of being inferential.

(statistics) A branch of statistics studying statistical inference—drawing conclusions about a population from a random sample drawn from it, or, more generally, about a random process from its observed behavior during a finite period of time.