calculating MSE and Mean in an array

I am trying to calculate fairness index of some values that are in an array like:

   loadofRRH = [L1,L2,L3,L4,L5,L6]

which can be calculated from:

fainessindex=MSE(L1,L2,L3,L4,L5,L6)/Mean(L1,L2,L3,L4,L5,L6)

as the article that I am reading says, this fainness index has to be between 0 and 1. but what I am getting is more than 1 for example it gives me 8!

I have written the code in matlab like:

    MEAN=mean( nonzeros(loadofRRH) );
    mainMSE=var(nonzeros(loadofRRH));
    fairnessindex=mainMSE/MEAN;

is there some thing that I am doing wrong? can anyone help me with this?

[negin tebyani]

calculating with matlab and array = [ 2 60 14 17 1 27] I get 475.7667

calculating it in here I get 396.47222 and doing it manually with the way that has been told here I get 594.7!

which one is correct?