It would be nice to know something about the accuracy of the age estimate (stdev? or 66% of 29-year old's trials are between blaah and blaah?), and also, how ma

It would be nice to know something about the accuracy of the age estimate (stdev? or 66% of 29-year old's trials are between blaah and blaah?), and also, how many tries did the test subjects get. I got a couple of "we are not sure you are human" ratings after a few tries (around ten tries total).