Answer
An observation study is a study in which the assignment of elements to different treatments is in a voluntary manner, and the observer will then observes the result of the study. An experiment is a method of collecting data by controlling some or all factors.
Work Step by Step
An observation study is a study in which the assignment of elements to different treatments is in a voluntary manner, and the observer will then observes the result of the study. An experiment is a method of collecting data by controlling some or all factors.