A school district has requested a survey be conducted on the socioeconomic status of their students. Their budget only allows them to conduct the survey in some of the schools, hence they need to first sample a few schools.
Students living in this district generally attend a school in their neighborhood. The district is broken into many distinct and unique neighborhoods, some including large single-family homes and others with only low-income housing.
Which approach would likely be the least effective for selecting the schools where the survey will be conducted?