Given the data in the table about the number of text messages per day, what is the relative frequency of the people age 12–15, who had over 500 messages? Round the percentage to the nearest tenth

To find the relative frequency of the people age 12-15 who had over 500 messages, we first need to add up the total number of people in that age group who had over 500 messages.

From the table:

Age 12-15, over 500 messages = 10 + 5 = 15 people

The total number of people is:
Age 12-15 = 10 + 5 + 15 + 20 = 50 people

The relative frequency of people age 12-15 who had over 500 messages is:
Relative frequency = (15/50) * 100% = 30%

Therefore, the relative frequency of people age 12-15 who had over 500 messages is 30%.