This report is based on a telephone survey of 501 adults aged 18 years or older who
reside in Colorado. It complements a national telephone survey of 1,015 adults.
The interviews with Colorado residents were conducted in January 2000 and averaged 28
minutes in length. The interviews were conducted using a random sample of households
in Colorado and a standard, random-digit-dialing technology whereby every household
in the region covered had an equal chance of being contacted, including those with
unlisted numbers. The margin of error for the 501 randomly selected Colorado adults is
+/– 4 percentage points.
The questionnaire was designed by Public Agenda, and all interpretation of the data
reflected in this report was done by Public Agenda. As in all surveys, question order
effects and other non-sampling sources of error can sometimes affect results. Steps were
taken to minimize these, including extensively pre-testing the survey instrument and
randomizing the order in which some questions were asked.