4. A recent study observed the number of bike riders ages 0 to 20 that wear helmets.
The results are represented in the table.
0-5 years
6-10 years
11-15 years
15-20 years
wear helmet did not wear helmet
21
34
14
3
4
14
18
12
Make an observation based on a data value that is not in the table. Explain your
reasoning.
