Question

In an experimental design, a(n) ____________ group is not exposed to the treatment, and this allows a researcher to identify any effects of the experiment that are not caused directly by the treatment.

Answer 1

Answer: normal

Explanation:

In experimental design, especially those involving drug treatment, specimens (e.g mice, rabbit etc) are drafted into several groups to study their degree of response to the particular drug being investigated.

Of all, a group of specimens named NORMAL is usually NOT exposed to treatment in order to

- allow objective comparison between scientific parameters before and after experiments