A researcher is interested in finding out which multivitamins are most widely used by Americans. He randomly samples 3,188 individuals, collecting and recording information about their multivitamin use. Which of the following accurately identifies the study design used here?(1 point)
Responses
observational study
observational study
survey
survey
experimental study
experimental study
There is insufficient information to answer the question.
There is insufficient information to answer the question.