130 adults with gum disease were asked the number of times per week they used to floss before their diagnoses. The (incomplete) results are shown below:

Cumulative Frequency

# of times floss per week

0

1

12

Frequency

12

21

13

Relative Frequency

0.0923

0.1615

0.1

0.1385

33

2

46

64

20

0.1538

100

0.1308

117

0.1

130