Biology, 02.10.2019 17:30 xeno777

In order to test the effectiveness of a new vaccine, 50 volunteers are selected and divided into two groups. one group is the control group and the other is the experimental group. both groups are given a pill to take that is identical in size, shape, color and texture.
based on the experiment scenario:
1. describe the control group.
2. describe the experimental group.
3. what variable is kept constant?
4. what variables are being changed?
answer in at least 4 complete sentences.

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