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95% confidence intervals for those curious about the statistical significance given the small Olin sample size:

Olin: 1.80% - 4.06%

MIT: 0.71% - 0.81%

Stanford: 0.48% - 0.54%

What if you had the data for just the engineering and computer science majors?

I don't understand the question.

Stanford has many majors -- what are the means and interval sizes per Stanford major?

That's a good question, but I don't have the data to answer it.