Construct and interpret two-way frequency tables as sample spaces for independence and conditional probability.
Complete a row-relative-frequency table
Problem
Using the table, divide \(12\) and \(8\) by their row total \(20\), then divide \(10\) and \(20\) by their row total \(30\). Reduce each row-relative frequency and verify each row sums to \(1\).
Row-relative frequencies use a different denominator for each row. We’ll divide every cell by its own row total, reduce the first distribution, repeat for the second row, and verify that each completed row—not the whole table—sums to one.
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