What are my chances at 2nd-tier math and cs schools like Cornell, Northwestern, and UMich?

“They don’t just want a bunch of kids with high stats.”
Well if we’re talking Emory, they definitely want a bunch of kids with high stats, depending on your definition of high stats. Latest CDS has Emory with over 88% of freshman with over a 30 ACT and 50% over 700 verbal, 70% over 700 math. Their 25/75 is 31/34, and 1350/1520. That’s pretty high stats to me. There are not a lot of low-stats kids walking around Emory.