In an increasingly data-driven world, it is more important than ever for students as well as professionals to better understand basic statistical concepts. 100 Questions (and Answers) About Statistics addresses the essential questions that students ask about statistics in a concise and accessible way. It is perfect for instructors, students, and practitioners as a supplement to more comprehensive materials, or as a desk reference with quick answers to the most frequently asked questions.

What Is the Range, and How Is It Computed?

What Is the Range, and How Is It Computed?

The range, which is the most gross measure of variability, is computed by subtracting the lowest score in a set of data from the highest score. It simply provides a measure of the distance between two points without taking into account any of the other points between those two (which is why it is a very general and often imprecise measure). It is, however, a useful tool for getting an idea of the extent of the variability within a set of scores.

There are two kinds of ranges.

The first type is the exclusive range, which is computed as



  • r = range,
  • h = the highest score in the set of scores, and
  • l = the lowest score in the ...
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