Independent and dependent variables are mathematical tools used in an experiment to keep track of what's going on. They allow you to maintain control over your experiment in a quantitative way. That is, using them, you will be able to measure your results and draw accurate conclusions.
Compton is not that bad. I think the most dangerous streets of Compton are located in North Compton. For example, in Long Beach Blvd, border with Lynwood, you see a lot of prostitution. Some nice parts of Compton are the are located in the Sunny Cove area near the airport and small pockets all throughout the city.
Compton is one of the 272 neighborhoods in Mapping L.A., The Timesâ resource for crime, neighborhoods, demographics and schools.