Basically take a list of lists and find the average of each list in it. Haskell/ML List Manipulation f (\left [a_{1},a_{2},\cdots, a_{n-1},a_{n}],[b_{1},b_{2},\cdots, b_{m-1},b_{m}],\cdots, [\alpha _{1},\alpha_{2},\cdots,\alpha_{p-1} ,\alpha_{p}],[\beta_{1},\beta_{2},\ cdots,\beta_{q-1},\beta_{q}] \right)\to \left [ \frac{\sum_{i=1}^{n}a_{i}}{n}, \frac{\sum_{i=1}^{m}b_{i}}{m},\cdot s , \frac{\sum_{i=1}^{p}\alpha_{i}}{p}, \frac{\sum_{i=1}^{q}\beta_{i}}{q} \right ]