Rangkuti, A. and Karo-Karo, I.R. 2026. The Effect of the Group Investigation Model Assisted by the “Make a Match” Game on Mathematical Problem-Solving Ability in Statistics. Journal of Mathematics Instruction, Social Research and Opinion. 5, 3 (Aug. 2026), 2405–2414. DOI:https://doi.org/10.58421/misro.v5i3.1995.