identify the type of study described. the nat...
identify the type of study described. the national highway traffic safety administration conducts annual studies on drivers seatbelt use at a random selection of roadway sites in each state in the united states. to determine if seat belt usage has increased, data are analyzed over two successive years. observational study experiment survey
Answer
# Brief Explanations:
In an observational study, researchers observe and collect data without interfering or manipulating variables. Here, the National Highway Traffic Safety Administration is simply observing drivers' seat - belt use at random sites and analyzing data over time without any intervention or manipulation, which is characteristic of an observational study. In an experiment, there would be an intervention or treatment applied, and in a survey, data is typically collected through questionnaires or interviews.
# Answer:
observational study