Grace was curious if married people were more likely to be safe drivers
than unmarried people.
Grace took a random sample of car accident records from the past 5 years
in her country, and she calculated what percent of accidents
in the sample
were caused by married people. She compared that
result with the
percentage of all drivers in the country that
were married during
that time
period.
What type of observational study is this?
Choose 1 answer:
A
A retrospective study
B
A prospective study
A sample survey
None of these. It's an experiment, not an observational study.