Median calculator Formula:
    m = X_(n+1)/2, when n is odd
    m = X_n/2 + X_(n/2+1), when n is even
Where:
   x: Numbers
   n: Total number
   m: Median


Mean calculator Formula:
    µ = ∑(x) / N;
Where:
   x: Numbers
   N: Total number
   µ: Arithmetic Mean