"""
 average3.py
 class exercise Sep 11 2012
"""
from math import sqrt

numbers = input("What are the numbers? ")
# print "You said ", numbers
total = 0.0
for x in numbers:
    total = total + x
    # print "    this number is ", x
    # print "    total is now", total

n = len(numbers)
average =  total/n
print "The average is ", average

total = 0.0
for x in numbers:
    total = total + (x - average)**2

s = sqrt(total/n)
print "The standard deviation is ", s