underpowered
adj.—Gloss: in research or information-gathering, having insufficient data. «Analysis by fluorescence in situ hybridization to assess genetic amplification of Her-2-positive tumors revealed discrepancies between the two techniques used for tumor classification. Incorrect classification of a tumor’s Her-2 status could lead to underpowered statistics and erroneous results.» —“Personalizing Oncolytic Virotherapy?” by Balveen Kaur, E. Antonio Chiocca Molecular Therapy , 2007. (source: Double-Tongued Dictionary)