A 2013 survey of 1,050 parents who have a child under the age of 18 living at home asked about their opinions regarding violent video games. A report describing the results of the survey stated that 89% of parents say that violence in today's video games is a problem.
a. Find a 95% confidence interval for the proportion of parents who that that violence in today's video games is a problem.
b. Convert the estimate and your confidence interval to percents.
c. Discuss reasons why the estimate might be biased.