Dataset and analysis of a study on linear functions in mathematics and physics

The file "gee_markdown_analysis" shows a detailed analysis using Generalized Estimating Equations (GEE) in R markdown. The dataset used here is a data from a school-study on comprehension of mathematics and phyiscs tasks on linear functions which uses the validated testinstrument from Ceuppens et al. (2019). For more Information about the test instrument and its structure see https://link.aps.org/pdf/10.1103/PhysRevPhysEducRes.15.010101.