<p>"So, for every male there are 6.7 females??? "
Yes. That’s what someone posted, I haven’t verified, you can compute yourself.
My recollection was it was for the private colleges of the consortium, but apparently it excludes Hampshire, it was Amherst + Smith + Mount Holyoke. Prospective amherst women can decide for themselves the extent to which the ratio they are interested in (if any) should include Hampshire or U Mass. There are certainly guys at U Mass. And Hampshire. As poster unregistered noted. The 6.7 stuck in my head because I read it on CC and it was the ratio I thought might be most relevant when my D2 was thinking of transferring someplace. YMMV.</p>