A recent national telephone survey reports that 57% of those surveyed think violent movies lead to more violence in society. The survey included a random sample of 1000 American adults and reports: ‘‘The margin of sampling error is +/- 3 percentage points with a 95% level of confidence.”
(a) Define the relevant population and parameter. Based on the data given, what is the best point estimate for this parameter?
(b) Find and interpret a 95% confidence interval for the parameter defined in part (a).