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There are 3 NRICH Mathematical resources connected to Carroll diagrams/two-way tables, you may find related items under Handling, processing and representing data.
Broad Topics > Handling, processing and representing data > Carroll diagrams/two-way tablesHow can we find out answers to questions like this if people often lie?
Displaying one-variable and two-variable data can be straightforward; what about three or more?
This pilot collection of resources is designed to introduce key statistical ideas and help students to deepen their understanding.