no
you can try ~ 10% for 100m difference
you've got it wrong way around
if the difference is 10% for sprints, it is more like
9.5%
for non-sprints as importance of testosterone/muscle becomes less important & endurance more
no
try 1.10 for 100 - 400
for longer distances, try
1.095
as better theoretical conversion factor & then you will see why women's non-sprints are so p!ss-weak & likes of these africans are only bringing the times to a half-decent level