Is the study experimental or observational?
-The highway department paves one section of an Interstate with Type A concrete and an adjoining section with
Type B concrete and observes how long it takes until cracks appear in each.
A)Observational
B)Experimental

Question

Quizplus · Accepted Answer

This is an experimental study because the highway department actively intervenes by using two different types of concrete to compare their durability, rather than merely observing natural occurrences.

Is the Study Experimental or Observational