Asking about avg isn’t a great idea, you really want the modal, which might be near the avg but may not be. This was an issue that came up when they tried to design the optimal fighter cockpit in WWII, they designed a cockpit that fit no one well.
This "female" test dummy won't actually be representative of most drivers, just as the "male" test dummy isn't. Neither for men nor for women. I'm sure the people who interpret the test results understand this already of course.