You are correct I took a conclusion that my data might not support. the paper measured empathy in the same group at age 13 and age 16 they found that girls had higher empathy at both ages but the difference increased with age.

there is also this study: "Testosterone may reduce empathy by reducing brain connectivity" http://www.psypost.org/2016/03/testosterone-may-reduce-empat...

"Half of the women were given an orally administered dose of testosterone sufficient to increase the levels of the hormone in their blood by a factor of ten, while the other half received a placebo. The women who were given testosterone subsequently took significantly longer to identify the emotions depicted images of eyes, and made significantly more errors while doing so."