In males;<br><br>High IQ and low testosterone equals highly successful computer nerd type. But he could have a successful career in the arts also. <br><br>Average IQ and average testosterone equals your basic  middle class guy. Gets a college degree. Takes a corporate or civil service job. Slowly moves up. Retires after 40 years with a modest pension and a watch. <br><br>High IQ and high testosterone equals over achieving frat boy who is very successful in finance but he almost had a career in professional sports.<br><br>Low IQ and high testosterone equals poor decision making low income, violence, crime and sometimes prison. He usually has a shorter than average life span.