Residential Study, 2004

Decision Resources, Ltd., contacted 600 randomly selected households in Township High School District 214. The
sample was stratified by High School Attendance Zones. Residents were interviewed by telephone between
December 16th, 2004 and January 6th, 2005. The average interview took twenty-six minutes. The results of this
sample may be projected to the universe of all adult residents of District 214 within ± 4.1% in 95 out of 100 cases.