Summary

In this module, we learned about the various types of data that we encounter in data science. First, we learned that data are divided conceptually into two main types: categorical data and numerical data. Next, we learned about nominal data, named categories without a natural rank order. Then, we learned about ordinal data, named categories with a natural rank order. Next, we learned about interval data, numerical measurements with an arbitrary zero point. Finally, we learned about ratio data, numerical measurements with a natural zero point. In the next module, we’ll learn about data types and how we store these various types of data in a computer.