def seansYoke():

            binBoundary1 = np.linspace(0,80,100)
            binBoundary2 = np.linspace(300,100,2000)
            plt.hist(average_user_age, bins=binBoundary1, histtype='stepfilled', normed=True, color='b', label='User age')
            plt.hist(no_of_sales, bins=binBoundary1, histtype='stepfilled', normed=True, color='r', alpha=0.3, label='Rating')
            plt.title("Average user age vs Useability rating")
            plt.xlabel("Age")
            plt.ylabel("Rating")
            plt.legend()
            plt.show()