math · Grade 9 · Statistics
Compare Center Spread and an Outlier
Calculate and interpret center and spread in a small data set.
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Explore the related learning targets, foundations and possible next connections.
Learning goals
- Calculate and interpret center and spread in a small data set.
Before you begin
Understand the words and representations introduced in the Explore activity.
Age and grade do not measure readiness. Adjust reading or adult support to preserve the intended learning goal.
Follow the sequence
Complete practice
Practice previewCompare Center Spread and an Outlier
Practice · Independent · 25 min
Calculate and interpret center and spread in a small data set. A complete set with exploration, practice and application. Use the linked unit for the learning sequence and teaching guide.
1. Explore
Practice previewCompare Center Spread and an Outlier: Explore and Explain
Explore · Independent · 10 min
Calculate and interpret center and spread in a small data set. A focused learn activity. Use the linked unit for the learning sequence and teaching guide.
2. Practice
Practice previewCompare Center Spread and an Outlier: Practice Independently
Practice · Independent · 10 min
Calculate and interpret center and spread in a small data set. A focused practice activity. Use the linked unit for the learning sequence and teaching guide.
3. Apply
Practice previewCompare Center Spread and an Outlier: Apply and Create
Apply · Independent · 15 min
Calculate and interpret center and spread in a small data set. A focused apply activity. Use the linked unit for the learning sequence and teaching guide.
Download the unit pack
Numbered activities, separate answer keys and a teaching guide in one ZIP. The pack uses the focused sequence; the complete practice sheet above is an alternative.
Teaching and response guide
- Begin with: Find the median.
- Connect the response to: Find the range.
- Ask students to apply the idea: Which center better represents the cluster of short times here? Explain.
Watch for: Accepting an answer without checking whether it uses the material and satisfies the requested relationship or criteria.
Check the answer criteria for each task. A supported explanation may have more than one acceptable response. These activities offer evidence to discuss; completing a sheet alone does not establish mastery.