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10 cards from this deck
To organize and display bivariate data clearly.
Use totals to subtract known values from row/column totals.
Rows represent one category, like age groups.
Columns represent another category, like preferences.
34 adults preferred custard, total 52 adults.
17 males play wind/brass (40 - 23).
53 students were surveyed about news sources.
The total number of girls surveyed is 8.
Forgetting to check that all totals add up correctly.
It explains what the numbers mean in real situations.
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