Chapter 2
Data Classification
Data Classification
In this chapter, you'll learn the difference between quantitative and qualitative data. You'll also learn about ratio, interval, ordinal, and nominal data types, and what operations you can perform on each of them.
Quantitative and Qualitative Data
All data is either quantitative – measured with some kind of measuring implement, such as a ruler, jug, weighing scales, stopwatch, thermometer, and so on – or is qualitative: an observed feature of interest that is placed into categories, as in health (healthy, sick), and opinion (agree, neutral, disagree).
Quantitative and qualitative data can be sub-divided into four further classes of data – Ratio, Interval, Ordinal, and Nominal – as shown ...
Get Associations and Correlations now with the O’Reilly learning platform.
O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.
