Grouping and displaying data to convey meaning: Tables and Graphs

Chien-Ling Lee owns a CD store specializing in spoken-word recordings. Lee has 35 months of gross sales data, arranged as a frequency distribution.

Monthly SalesFrequencyMonthly SalesFrequency
$10,000–12,4992$20,000–22,4996
12,500–14,999422,500–24,9998
15,000–17,499725,000–27,4992
17,500–19,999527,500–29,9991
  1. Construct a relative frequency distribution.
  2. Construct, on the same graph, a relative frequency histogram and a relative frequency polygon.

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