I'm going to steal a quote from the last thread:
QuoteFrom a study of 136 males and 137 females:[13]
Males: mean 0.947, standard deviation 0.029.
Females: mean 0.965, standard deviation 0.026.
Assuming a normal distribution, the 10th and 90th percentiles for males are 0.910 and 0.984. For females: 0.932 and 0.998.
My estimated 2D:4D digit ratio: 1.04
Male t-score: t = (1.04 - 0.947)/0.029 ~= 3.21 (df = 135, Two-tail p = 0.0017)
Female t-score: t = (1.04 - 0.965)/0.026 ~= 2.88 (df = 136, Two-tail p = 0.0046)
With a 99% level of confidence, I conclude I am neither a human male a nor human female. Either I have some other gender, or I AM OF ANOTHER SPECIES!
(Conclusion of non-human nature subject to other tests or
Bayesian statistics 🔗 [Link: xkcd.com/1132/].)
If humanity and binary gender status is actually assumed, the estimated ratio of women to men with higher digit ratio is remarkably less than 3:1 (helped by females having a lower standard deviation). Even presuming humanity and gender binary, the trans test is insufficiently predictive.