Interquartile Range (IQR)

Lesson in the BI Analyst Roadmap · Stage 7: Variables and Data Types

Last updated 14 September 2026

What is Interquartile Range (IQR)?

The Interquartile Range (IQR) is a measure of statistical dispersion, representing the spread of the middle 50% of a dataset. It's calculated as the difference between the third quartile (Q3) and the first quartile (Q1). The IQR is resistant to outliers, making it a robust measure of variability when extreme values are present.

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Free resources to learn Interquartile Range (IQR)

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Interquartile Range (IQR): common questions

Can I learn Interquartile Range (IQR) in Hindi?

This lesson is written in English. Once you sign in, open it in the interactive course and ask the AI tutor to explain Interquartile Range (IQR) in Hindi or Hinglish. The tutor answers from this lesson’s own text, so it stays on the syllabus, and it runs on your own Google, OpenAI or Anthropic key.

Is this Interquartile Range (IQR) tutorial for beginners?

It is lesson 29 of 200 in the free BI Analyst roadmap, in stage 7, Variables and Data Types. If you are new to BI Analyst, start from stage 1 and come back here in order; if you already know the earlier stages, this lesson stands on its own.