Apoll asked the question, "what do you think is the most important problem facing this country today? " twenty-three percent of the respondents answered "crime and violence." the margin of sampling error was plus or minus 4 percentage points. following the convention that the margin of error is based on a 95% confidence interval, find a 95% confidence interval for the percentage of the population that would respond "crime and violence" to the question asked by the pollsters.