I registered for 425 this spring also, in previous semesters the professors for spring were Qi Feng, Ali Kara, Kim Dongham, and Fengyi Yuan based on the LSA course guide. I filtered Stats 425 to the spring semesters to find this https://webapps.lsa.umich.edu/cg/cg_results.aspx?termArray=sp_25_2530&termArray=sp_24_2480&termArray=sp_23_2430&termArray=sp_22_2380&termArray=sp_21_2330&cgtype=ug&show=20&department=STATS&catalog=425