Audiences and creators know that on one level or another, there’s an inherent gender bias in the movie business — whether it’s the disproportionately low number of films with female leads, the process of pigeonholing actresses into predefined roles (action chick, romantic interest, middle-aged mother, etc.), or the lack of serious character development for women on screen compared to their male counterparts. What’s challenging is quantifying this dysfunction, putting numbers to a trend that is — at least anecdotally — a pretty clear reality. One of the most enduring tools to measure Hollywood’s gender bias is a test originally promoted by cartoonist  Alison Bechdel  in a 1985 strip from her “Dykes To Watch Out For” series. Bechdel said that if a movie can satisfy three criteria — there are at least two named women in the picture, they have a conversation with each other at some point, and that conversation isn’t about a male character — then it passes “The Rule,” whereb...