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.)
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.