Practice Interquartile Range (iqr) (6.4.2) - Unit 5: Data Handling & Analysis: Making Sense of Information
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Interquartile Range (IQR)

Practice - Interquartile Range (IQR)

Learning

Practice Questions

Test your understanding with targeted questions

Question 1 Easy

Calculate the IQR for the following dataset: {3, 6, 9, 12, 15}.

💡 Hint: Remember to find Q1 and Q3 first.

Question 2 Easy

What is Q2 if the ordered dataset is {5, 10, 15, 20}?

💡 Hint: Find the median.

4 more questions available

Interactive Quizzes

Quick quizzes to reinforce your learning

Question 1

What does the IQR measure?

A. The total range of data
B. The spread of the middle 50% of data
C. The maximum value minus the minimum value

💡 Hint: Think about what IQR stands for.

Question 2

True or False: The IQR is affected by outliers.

True
False

💡 Hint: Consider how we define quartiles.

2 more questions available

Challenge Problems

Push your limits with advanced challenges

Challenge 1 Hard

Given the dataset {5, 7, 10, 15, 20, 25, 30, 31}, determine the IQR and analyze the impact of the outlier 31.

💡 Hint: Think about how quartiles help separate data.

Challenge 2 Hard

If a dataset is skewed right, explain how that will affect the IQR compared to data that is symmetrically distributed.

💡 Hint: Consider how the skewness of data distributes across quartiles.

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Reference links

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