Choose
Read the question.
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Data Pond
Compare two data sets.
Try
Inspect the values and summaries.
Check
Choose the stronger claim and justify it.
Year 7–8 maths mission
Data Evidence Unit
Averages can hide surprises. Inspect the distribution before making a decision.
1 / 4
Preview mode. You can complete the whole mission, but this run is not recorded.
- 1BriefUnderstand the job
- 2BuildBuild a model
- 3DecideMake a decision
- 4DebriefConnect it to a test
Compare litter counts from two creek survey sites.
Willow Bend
6778899
6778899
Bridge Track
67788924
67788924
SiteMean (1 d.p.)MedianRange
Willow Bend
Bridge Track
Centre + spread + shape
Calculate each summary from the actual values. Do not choose a site yet.
Meanuses every value
Medianresists one extreme value
Rangeshows total spread