What method was used by the characters in the film to gather data?

Perform a film analysis on “Erin Brockovich” using the format 1-5 below.
1. Discuss survey research.
2. What method was used by the characters in the film to gather data?
3. How was a needs assessment conducted by the researcher in the film?
4. How was the needs assessment used to obtain information about the prevalence, distribution, and
interrelations of variables within the affected population?
5. Discuss ethical implications about the researcher’s actions.