A group of researchers wants to study the effect of listening to music at different volumes on driving reaction times. They recruit 100 volunteers.
Half of the subjects with fewer than 10 years of driving experience are randomly assigned to take the test
with one music volume, and the other half are assigned to take the test at the other music volume. The
same method is used to randomly assign half of the drivers with at least 10 years of driving experience to
each testing condition.
What type of experiment design is this?
Choose 1
Stratified