scaling, standardization and Z score in Python

titanic.fare.plot(figsize = (12,8))
titanic.age.plot(figsize = (12,8))
plt.show()

mean_age = titanic.age.mean()
mean_fare = titanic.fare.mean()

std_age = titanic.age.std()
std_fare = titanic.fare.std()

titanic["age_z"] = round((titanic.age-mean_age) / std_age,2)
titanic["fare_z"] = round((titanic.fare-mean_fare) / std_fare,2)

round(titanic.describe(),2)

titanic.fare_z.plot(figsize = (12,8))
titanic.age_z.plot(figsize = (12,8))
plt.show()