Research MBA Programs

Hi All,

I am doing a little bit of reseacrh on MBA schools, as I am planning to apply for 2013 session. I am currently just going through school profiles in FT as well as Business Week rankings, but getting confused by the figures.
For instance, City University, Cass:

1) FT - Two components are Salary Today and Weighted Salary, both are $111,552.
2) Business Week - The components are Mean Base Salary, which is $87,310, while Median base salary is $85,706.

I am pretty much confused in the numbers shown in above two rankings, and we are talking about quite a difference here.

Can somebody enlighten me please?