This study aims to describe the representation ability profile of prospective English teachers in terms of Prior Knowledge (PK) and the types of errors that are made based on the Newman procedure. The research method used is descriptive qualitative case research. The subjects of this study were 50 level IV students taking Statistics on ELT (English Language Teaching) courses in the English Language Program at a university in Cirebon. The results of the data show that the ability of the prospective teacher's mathematical representation in solving statistical questions in ELT in terms of PK, namely the upper group with an average of 76.57% lower than the average midterm score of 95.75, the middle group with an average 67.82% lower than the midterm average of 82, and the lower group with an average of 38.33% lower than the midterm average of 57%. The types of mistakes made by the SKB group were many mistakes in understanding the problem, transforming the problem, and the final answer.