The mean salary of all female workers is $35,000. The mean salary of all male workers is $41,000. What must be ture about the mean salary of all workers?
(a) It must be $38,000.
(b) It must be larger than the mean salary.
(c) It could be any number between $35,000 and $41,000.
(d) It must be larger that $38,000.
(e) It must be larger than $41,000.