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Flossing Frequency for Adults with Gum Disease

Avg difficulty 2.5

Sixty adults with gum disease were asked the number of times per week they used to floss before their diagnosis. The (incomplete) results are shown in the table.

# Flossing per Week Frequency Relative Frequency Cumulative Relative Frequency
0 27 .4500
1 18
3 .9333
6 3 .0500
7 1 .0167
  1. Fill in the blanks in the table.
  2. What percent of adults flossed six times per week?
  3. What percent flossed at most three times per week?

OpenStax Statistics, 1.3 Frequency, Frequency Tables, and Levels of Measurement, exercise 13

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Adapted from Statistics © 2022 Rice University. Licensed under CC BY 4.0. Source: Statistics. Imported at revision 7dea80a.