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Data 1
Types of data: The quantity, not the written format, determines type.
Questions and collection: Match the collection method to the question.
Frequency tables: Multiply values by their frequencies when summing.
Data 2
Grouped data: State interval boundaries and lost precision.
Charts 1
Bar charts and line charts: Choose a graph that matches the data type.
Pictograms: The key determines the count.
Pie charts: Part of total becomes part of a full turn.
Charts 2
Grouped numerical charts: An interval bar summarises many possible values.
Misleading displays: Inspect the scale as well as the pattern.
Connections
Data 1 → Charts 2: Representations support qualified conclusions
