A researcher wants to determine the success rate of a driver's education program conducted in high schools in a particular
state. Which method would assure random selection of a sample from the population?
The researcher should select one high school in the state and survey all of the students in that school who are
enrolled in the training program.
The researcher should randomly select one high school in the state and survey a random batch of students who are
enrolled in the training program.
The researcher should randomly select a city in the state and survey all students in that city who are enrolled in the
training program.
The researcher should randomly select students from among all the students in the state who are enrolled in the
training program.