That’s definitely great data from @grandalf78. However, note that the data digest information is for enrolled students. Purdue also provides this information at the COE FAQ page regarding admitted students:
“Typically, those admitted to the First-Year Program are A and B students in high school. Students enrolled to the College of Engineering for 2017 had an average combined SAT in the middle 50% range of 1320-1440, being 1407. Of the students that enrolled, 50% had an average GPA of 3.93 and an ACT Composite in the range of 28-33, with the average being 32.”