import sys

sum=0
n=0

#Sum input values in the data.txt file
file_name='data_2.txt'
for num in open(file_name):
	new_change
	sum += float(num)
	n += 1

print sum/n

17883b2aa0eaa7767d2ebf984585e33e9af52b56
import sys

sum=0
n=0

#Sum input values in the data.txt file
file_name='data_2.txt'
for num in open(file_name):
	new_change
	sum += float(num)
	n += 1

print sum/n
