Understanding Interquartile, Semi-Interquartile and Midquartile Ranges
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Beginner
Start here! Easy to understand
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Beginner Explanation
The interquartile range (IQR) is simply the range of the middle 50% of your data: $Q_3 - Q_1$.
Practice Problems
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1
Quick Quiz
Single Choice Quiz
Beginner
If $Q_1$ is 25 and $Q_3$ is 45, what is the interquartile range?
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2
Real-World Problem
Question Exercise
Intermediate
Teenager Scenario
Imagine you're analyzing the time your classmates spend on homework. You find $Q_1$ is 30 minutes and $Q_3$ is 60 minutes.
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3
Thinking Challenge
Thinking Exercise
Intermediate
Think About This
Given that $Q_1$ is 16 and $Q_3$ is 48, determine the semi-interquartile range.
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4
Challenge Quiz
Single Choice Quiz
Advanced
If $Q_1 = 12$ and $Q_3 = 52$, which of the following is an outlier given a data point of 90?
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Recap
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