Exercises: Summarize Categorical Data in Two-Way Frequency Tables

Work through each section in order. Many problems use a two-way frequency table; read it carefully and note the row totals, column totals, and grand total. Before computing any relative frequency, ask "out of whom?" — the denominator is the grand total for joint and marginal frequencies, but a row or column total for a conditional frequency. Express relative frequencies as percents rounded to the nearest tenth of a percent unless told otherwise.