Create / draw frequency polygon from the data used in above questions.

Q. Create / draw frequency polygon from the data used in above questions.

Answer :-

import matplotlib.pyplot as plt

x=[78 ,72, 69 ,81 ,63 ,67 ,65 ,75 ,79 ,74 ,71, 83 ,71 ,79 ,80 ,69 ]
a,bins,c=plt.hist(x,bins=7,histtype='step')
l=list(bins)
l.insert(0,0)
l.insert(len(bins)+1,bins[len(bins)-1])
mid=[]
for i in range(len(l)-1):
      ele=(l[i]+l[i+1])/2
      mid.append(ele)
x=list(a)
x.insert(0,0)
x.insert(len(a)+1,0)
plt.plot(mid,x,'go--')
plt.xlabel("Age")
plt.show()

Output :-