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10 cards from this deck
It organizes data by two categories to show patterns.
Use: P = Successful outcomes / Total outcomes.
They show the sum of frequencies for each row category.
P(jam) = 10/32 = 0.3125.
Look for the highest frequency in the relevant category.
It's the total of all row or column totals combined.
Fill missing values ensuring row/column totals match.
P(tyres in January) = 15/75 = 0.2.
It makes calculations easier and results clearer.
Using the wrong total, like grand instead of row/column.
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