A city planning department surveyed residents about public transportation. A random sample of 300 residents who regularly use the city's bus system was interviewed, and of them expressed satisfaction with the bus schedule. Which of the following conclusions is best supported by the sample data?
Approximately 75% of all residents in the city are satisfied with the bus schedule.
The majority of all public transportation users in the city are satisfied with the bus schedule.
Approximately 75% of all residents who regularly use the city's bus system are satisfied with the bus schedule.
The city's bus schedule is satisfactory for most commuters.
