The Friday after Thanksgiving is the biggest shopping day of the year. You are interested in the number of people who claim to have finished their Christmas shopping at the end of this weekend. On Monday, you take a random sample of people by standing at a toll booth at 7:00 a.m. and asking every third commuter if he or she has finished Christmas shopping. Of the 67 commuters you poll, 14 claim to have finished Christmas shopping. A 90% confidence interval of the people in the surrounding communities who have finished Christmas shopping is