K-Fold Cross-Validation through Identification of the Opinion Classification Algorithm for the Satisfaction of University Students. - Omar Chamorro-Atalaya; José Antonio Arévalo-Tuesta; Denisse Balarezo-Mares; Anthony Gonzáles-Pacheco; Olga Mendoza-León; Manuel Quipuscoa-Silvestre; Gregorio Tomás-Quispe; Raul Suarez-Bazalar (Int. J. Online Biomed. Eng., 2023)