These two things are (generally) opposites. The Ivy League does not generally put many resources into their engineering programs and only a few of them are notable.
This is really a terrible way to select a graduate program for several reasons.
[ol]
[]There aren’t reliable statistics on graduate school admissions rates.
[]In graduate school, the goal is to find a research group that is strong and is a good fit. The name brand of the school and department are (largely) irrelevant beyond the fact that those name brand schools will probably, on average, have a larger percentage of truly strong research groups.
[li]Many of the top engineering programs are at large state school that often have high overall acceptance rates (based on undergraduate admissions, the only reliable statistics that I know of on admissions).[/li][/ol]