What is the difference between an observational experiment and a designed experi

Question

What is the difference between an observational experiment and a designed experiment?

Choose the correct answer below.

A. A designed experiment is one for which the analyst only designs the scope of the study and its research objective. An observational study is one for which the analyst observes the data and results of another researcher, and does not collect any data himself.

B. A designed experiment is one for which the analyst only designs the scope of the study and its research objective. An observational study is one for which the analyst observes the treatments and the response on a sample of experimental units.

C. A designed experiment is one for which the analyst controls the specification of the treatments and the method of assigning the experimental units to each treatment. An observational study is one for which the analyst observes the treatments and the response on a sample of experimental units.

D.   A designed experiment is one for which the analyst controls the specification of the treatments and the method of assigning the experimental units to each treatment. An observational study is one for which the analyst observes the data and results of another researcher, and does not collect any data himself.

Explanation / Answer

option C is correct

C. A designed experiment is one for which the analyst controls the specification of the treatments and the method of assigning the experimental units to each treatment. An observational study is one for which the analyst observes the treatments and the response on a sample of experimental units.

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