matplotlib

is a powerful graphing package for Python that can draw many kinds of

graphs. It is useful when you need to graph and analyze data. You can read about

the module at

http://matplotlib.sourceforge.net/

. Read the documentation

to learn how to use this module to plot a histogram of the data generated as a list

by the code below. Add graphical representations of the mean and the standard

deviation to the histogram. by python

from random import gammavariate

def randomList_gamma(n, a, b):

randomList = []

for i in range(n):

rand = float("{0:.1f}".format(gammavariate(a, b)))

randomList.append(rand)

return randomList

rand_list = randomList_gamma (1000 , 2, 2)

print(rand_list)