Are you implying a link between the fact that Ravenclaws are meant to be the smartest and the vast majority of members are female? 😉
Lol even though I would like to agree 😛 I think there could be other factors involved which could explain this phenomena. Plus I know if you look at the overall education levels you will find that females are in the lead when it comes to overall grades but not to the level reflected in this House. There's also the fact that the House system is based largely on facets of the personality as a whole - which means that even though Ravenclaws are known for their brains other House members can be equally or more smart but either lack or have other characteristics and behaviourisms that match the basic character definition of a Ravenclaw and hence end up in other Houses (e.g. Hermione Granger). 🙂