A survey is planned to determine what proportion of high-school students in a metropolitan school system have regularly smoked marijuana. The school administrators would like to estimate the proportion with 96 % confidence and a margin of error of no more than 5%.

• It was reported that 27.19% of high school students in a similar metropolitan area regularly smoke marijuana. If this estimate is used, what sample size would be required? n = _____________
• If the administrators choose not to use the estimate from the similar metropolitan area, what sample size would be required? n = _________________
• If the level of confidence were decreased to 95 %, what would happen to the required sample size?
• A larger sample size would be required.
• The sample size would not be affected.
• A smaller sample size would be required.