The Merrillville Police Department wants to know the average speed of cars on West Street. To find out, Officer
Nolan collects some statistical data.

1. Officer Nolan parks on West Street.

2. She uses a radar gun to measure the speed of every
car that passes.

3. Officer Nolan gives a ticket to each car going above
the speed limit

4. She meets with her supervisor to discuss the results
of her survey
Which step describes how the data were measured?