It seems to me that students are students. Each has a specific socio-psychological profile which determines whether they are suitable for such punishment and there also are important medical markers, which may do the same. Nevertheless, whilst there are tendencies to a preponderance of certain typologies in females, and other typologies in males, the real world is messy, and all of us, as I have said before are strung out on a continuum. It is of course useful for administrative purposes to divide along sex lines, but that is convenience, nothing more nor less.
So the girl who lied may not be typical of all girls; the girls who deliberately got our correspondent caned in senior school may not be stereotypical of the average girl in that school , but they are a sub-group who probably share certain important general characteristics with a subgroup of boys who would act in the same way.