Automatic Evaluation of Slope Comparison Tests in Analytical Chemistry E-Learning Classes

This study presents a method to grade laboratory practices and exercises of analytical chemistry, used within the course entitled “Advanced Analytical Chemistry” of the Chemistry Degree, at the Faculty of Sciences of the University of Extremadura (Spain). Particular emphasis was made on the automation of grading and personalization of the exercises. The former was made through Doctus, a teaching platform available at the University of Seville, while the latter was achieved by defining the input data of the exercises and the requested results as a function of the digits of the student’s ID. The students’ knowledge and competence acquired during the academic course is evaluated when they try to solve a personalized problem with the proposed application. In this paper, the procedure and tools for assigning and grading a Student’s t-test for the comparison of slopes are presented.