What statistical calculations could i use? ?

im doing something on statistics- comparing males and females at something. im trying to find whose estimated were more accurate- male or female. ive used standard deviation, mode, median, mean...none of that is actually answering my question. i cant use correlation coeficient (or can i?) because im comparing a set of numbers to a category (male/female) what else can i do to answer my question? help!! please im desparate? could i use chi2?