What type of sampling involves first sampling a group (like schools, households, towns) and then treating all individuals in that group as either all intervention subjects or all control subjects?

Which of the following is not a limitation of the Behavioral Risk Factor Surveillance Survey (BRFSS)?

In general, cross-sectional studies are useful for measuring and describing rare diseases.

You can estimate disease incidence using case-control studies.

Which of the following is not a limitation of the National Health and Nutrition Examination Surveys (NHANES)?

Who is considered a father of both epidemiology and anesthesiology?

Which of the following is an example of a negative exponential probability distribution?

In determining causality (Bradford-Hill Criteria), temporality refers to:

Researchers conducted a study using available state-level data for the US. They found a positive correlation between average state rates of cell-phone usage with average state rates of automobile fatalities. What kind of study is this?

If you are interested in finding out whether average obesity rates in 27 metropolitan areas are associated with the number of bikes per population in those metro areas, what kind of study would you conduct?