Question 8.315

14. Ecstasy and Emergency Room Visits. According to the National Institute on Drug Abuse (www.drugabuse.gov), 77% of the emergency room patients who mentioned MDMA (Ecstasy) as a factor in their admission were age 25 and under. Assume that the sample size is 200.

  1. Calculate and interpret the margin of error for confidence level 95%.
  2. Construct and interpret a 95% confidence interval for the population proportion of all emergency room patients mentioning MDMA (Ecstasy) as a factor in their admission who are age 25 and under.