if she 4:50 but mentally unstable a coach Will turn her away
If she's 4:40 but completely detrimental to the team and is showing warning signs of being dangerous than a coach will turn her away
That's why the question is pointless because obviously no time guarantees you anything oh, cuz there are always other factors
The reasonable question would be assuming you're a decent person and would present no problems fitting in on the team, what time would allow you to be part of at least practicing with the team
And as I've already said on multiple occasions no coach in their right mind would turn a girl who fits those qualifications and is currently in five minute mile shape away. If the coach is turning such a girl away then clearly there is more to the story with either the girl or the coach.