Lesson Plan

Describing Variability Using the Interquartile Range (IQR)

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The 13th lesson in a unit of 22 introduces the concept of the interquartile range (IQR). Class members learn to determine the interquartile range, interpret within the context of the data, and finish by finding the IQR using an exclusive process.

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CCSS: Designed
Additional Tags
Instructional Ideas
  • Lead a discussion on whether the interquartile range will always contain exactly 50 percent of the data
Classroom Considerations
  • Pupils should know how to determine the median
  • Learners need to be able to read a dot plot
Pros
  • Includes a discussion on when to use the interquartile range
  • Provides sample solutions to open-ended questions
Cons
  • None
Common Core