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