Solution:
As, we have to find, number of people in Chelsea school, who read news reports on the Internet daily.
To determine this, (1) She asks five people in her language arts class.
For better results, Chelsea can do
1. Choose students from different grade levels
2.Choose every fourth student in all language arts
As, increasing the sample size, will not yield a better result, sample of 5 is best to determine, the number of people in her school who read news reports on the Internet daily.