nonstatistical
adjective
non·sta·tis·ti·cal ˌnän-stə-ˈti-sti-kəl 
: not of, relating to, based on, or employing the principles of statistics : not statistical
a nonstatistical analysis
Any sample where the sample items are not selected according to the laws of chance—that is, by probability sampling—is a nonstatistical sample.
Howard Sibelman
Howard Sibelman
Word History
First Known Use
1881, in the meaning defined above