# 9. Calculate interquartile range (FP)

teaches Common Core State Standards CCSS.Math.Content.6.SP.A.3 http://corestandards.org/Math/Content/6/SP/A/3
teaches Common Core State Standards CCSS.Math.Practice.MP1 http://corestandards.org/Math/Practice/MP1

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Lesson objective: Compute the five number summary, range, and interquartile range.

This lesson helps to build procedural skill with calculating measures of variability. A numeric dataset is used here because it supports calculating the five number summary. This work develops students' understanding that a measure of variability is a number that describes the variation of a dataset.

Students engage in Mathematical Practice 1 (Make sense of and persevere through problems) as they calculate multiple descriptive statistical measures.

Key vocabulary:

• five number summary
• interquartile range
• maximum
• median
• minimum
• quartile
• range

Special materials needed:

• none
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