Why 70/100 Is Satisfactory? Why Five Letter Grades? Why Other Academic Conventions?

Authors

Christian Servin, El Paso Community CollegeFollow
Olga Kosheleva, The University of Texas at El PasoFollow
Vladik Kreinovich, The University of Texas at El PasoFollow

Publication Date

8-1-2021

Comments

Technical Report: UTEP-CS-21-76

Abstract

Why 70/100 is usually a threshold for a student's satisfactory performance? Why there are usually only five letter grades? Why the usual arrangement of research, teaching, and service is 40-40-20? We show that all these arrangements -- and other similar academic arrangements -- can be explained by two ideas: the Laplace Indeterminacy Principle and the seven plus minus two law.