The mayor of Los Angeles wants to sample the opinions of the adult residents of the city in order to estimate the percentage who favor the mayorâs proposal to tighten restrictions on public smoking. Nine hundred people are chosen at random from the Los Angeles phone directory, and 60% of them favor the mayorâs proposal. What is the population and the parameter in this situation:
The population is all adult residents of Los angeles; the parameter is the percent of all adult residents who favor the Mayor's proposal.
The population is all of the names in the directory; the parameter is the percent of the people in the directory who favor the Mayor's proposal.
The population is all adult residents of Los angeles; the parameter is 60%.
The population is the 900 people from the directory; the parameter is 60%