12. Opinion Poll: Crime and Violence A New York Times/CBS poll asked the question,
"What do you think is the most important problem facing this country today?
Nineteen percent of the respondents answered "crime and violence. The margin of
sampling error was plus or minus 3 percentage points. Following the convention
that the margin of error is based on a 95% confidence interval, find a 95% confi-
dence interval for the percentage of the population that would respond "crime and
violence to the question asked by the pollsters.