Programme ecrit_2006_487_.py

# coding: latin-1
def moyenne (tab) :
    s = 0.0
    for x in tab :
        s += x
    return s / len (tab)

def variance (tab) :
    s = 0.0
    for x in tab :
        t  = x - moyenne (tab)
        s += t * t
    return s / len (tab)

l = [ 0,1,2, 2,3,1,3,0]
print moyenne (l)
print variance (l)