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Activity focus

  • relative frequencies
  • row percentages
  • fair comparison across unequal group sizes

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Practice set

  1. Why can row percentages be better than counts?
  2. If row totals are 40 and a cell count is 10, what is the row relative frequency?
  3. A row of percentages adds to 84%. What likely went wrong?

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Answer key

  1. They adjust for different group sizes
  2. 10/40 = 0.25 = 25%
  3. Missing category, arithmetic error, or rounding issue too large to ignore