Use the infоrmаtiоn in the scenаriо to аnswer the questions that follow: The mayor of Philadelphia wants to sample the opinions of the adult residents of the city in order to estimate the percentage who favor the mayor's proposal to tighten restrictions on public smoking. Nine hundred people are chosen at random from the Philadelphia phone directory, and 60% of them favor the mayor's proposal. The survey research firm hired by the mayor's office then reports the results as follows: "The percentage favoring the new restrictions is around 60% with a 3% margin of error."