Respuesta :
carl is doing his homework and has the television on in the background. while it is on, several commercials aired. this represent EXPOSURE.
A cohort study is an epidemiological study that follows a group of people over time. A cohort is a type of epidemiological study that looks at a group of people who share a trait over time to figure out how many of them have a particular health outcome of interest, like an illness, condition, incident, death, or change in health status or behavior.
A cohort is a group of people who share a common characteristic, usually more than 100, like smoking, working in a lead smelter, being born in the same year, or enrolling in the same health insurance plan.Cohort studies compare an exposed group of people to a less exposed (or unexposed) group of people to determine whether the outcome of interest is related to exposure.
To know more about cohort refer:
https://brainly.com/question/28238114
#SPJ4
