# Import libraries 
import matplotlib.pyplot as plt 
import numpy as np 
  
  
# Creating dataset 
np.random.seed(10) 
  
data_1 = np.random.normal(100, 10, 200) 
data_2 = np.random.normal(90, 20, 200) 
data_3 = np.random.normal(80, 30, 200) 
data_4 = np.random.normal(70, 40, 200) 
data = [data_1, data_2, data_3, data_4] 
  
fig = plt.figure(figsize =(10, 7)) 
  
# Creating axes instance 
ax = fig.add_axes([0, 0, 1, 1]) 
  
# Creating plot 
bp = ax.boxplot(data) 
  
# show plot 
plt.show()