Placebos are used so that even the people who do not receive a treatment can benefit from the study. ? 2. Controlled experiments can be randomized or nonrandomized. ? 3. A well-designed placebo allows an experiment to be conducted blind. ? 4. Placebos are used to randomly assign participants to treatment or control ? 5. Using a random chance procedure to assign subjects to treatment or control reduces bias ? 6. A placebo is used in all controlled experiments. ? 7. In a blind experiment, the subjects do not know whether they are in the treatment group or control group. ? 8. In an observational study, the investigators assign the subjects to treatment or control

1. Placebos are used to randomly assign participants to treatment or control ?

False.

2. Using a random chance procedure to assign subjects to treatment or control reduces bias ?

True.

3. A well-designed placebo allows an experiment to be conducted blind. ?

False.

4. In an observational study, the investigators assign the subjects to treatment or control. ?

False.

5. In a blind experiment, the subjects do not know whether they are in the treatment group or control group. ?

True.

6. Placebos are used so that even the people who do not receive a treatment can benefit from the study. ?

True.

7. A placebo is used in all controlled experiments. ?

True.

8. Controlled experiments can be randomized or nonrandomized.

True.

Step-by-step explanation:

Placebos are not techniques for conducting experiments.  They are devices or drugs used when conducting a controlled study or research involving the administering of items to two different groups, such that one group gets the real item while the other group gets another item that is made to look like the real item without the participants knowing the difference. The purpose is to enable the results from the control group to be compared to the results of a treatment group. Randomization is the process used to assign subjects to treatment or control groups in order to reduce bias.

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