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This Measuring Variability for Skewed Distributions (Interquartile Range) lesson plan also includes:
- Descriptive Statistics - Module Overview (PDF)
- Descriptive Statistics - Module Overview (Doc)
- Measuring Variability for Skewed Distributions (Interquartile Range) (Doc)
- Measuring Variability for Skewed Distributions (Interquartile Range) (PDF)
- Measuring Variability for Skewed Distributions (Interquartile Range) (Doc)
- Algebra I Module 2, Topic B, Overview
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Should the standard deviation be used for all distributions? Pupils know that the median is a better description of the center for skewed distributions; therefore, they will need a variability measure about the median for those distributions. An exploratory lesson provides the background to determining the interquartile range to measure variability.
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CCSS:
Designed
Concepts
Additional Tags
Instructional Ideas
- The question might arise about using the standard deviation to measure the variability; calculate the standard deviation and discuss whether it provides an accurate description of the variability of the data
- Have students pair off and develop data sets that have the same interquartile range but different medians; allow the class to compare the different data sets
Classroom Considerations
- The seventh lesson of a 20-lesson module
Pros
- Sample solutions provided for guided practice, independent practice, and the exit ticket
- Developed with the Common Core state standards in mind
Cons
- None