Calc Stats:

Your task is to process a sequence of integer numbers
to determine the following statistics:

o) minimum value
o) maximum value
o) number of elements in the sequence
o) average value

For example: 6, 9, 15, -2, 92, 11

o) minimum value = -2
o) maximum value = 92
o) number of elements in the sequence = 6
o) average value = 21.833333


Reference
http://tddkatas.codeplex.com/documentation