We do studies to gather information and draw conclusions. Th…
We do studies to gather information and draw conclusions. The type of conclusion we draw depends on the study method used: In an observational study, we measure or survey members of a sample without trying to affect them. In a controlled experiment, we randomly assign people or things to groups. One group receives a treatment and the other group does not. For the studies listed below, determine if they are experiments or observational studies.