Combining a histogram with a normal distribution plot

We now have a histogram and a normal distribution plot individually, but it would be nice if we could visualize both them on one graph with the same scales. This can easily be done by referencing both plots in a single cell and then using the plt.show() function just once after both plots have been called:

plt.hist(VacationHours, normed = True) # plotting histogram 
plt.plot(VacationHours, normal_distribution_curve, color = "orange") #plotting normal curve 
plt.title("Vacation Hours") #Assign title 
plt.xlabel("Hours") #Assign x label 
plt.ylabel("Count") #Assign y label 
plt.show() 

The output of the combined plots can be seen in the following screenshot:

We now have a combined normal distribution plot and histogram for us to see the distribution of VacationHours across different job titles for AdventureWorks.

Annotating in Python

One of the nice features with matplotlib is the ability to annotate graphs to help guide users to areas of...