Análisis de datos en categorías con R

Aquí se replica el análisis realizado en: Kaushik, M. y Mathur, B. (2014). Data Analysis of Students Marks with Descriptive Statistics. International Journal on Recent and Innovation Trends in Computing and Communication. 2. 2321 - 8169. https://ijritcc.org/index.php/ijritcc/article/view/3136/3136