
Concept explainers
To find: The difference between a “blind experiment” and a “double-blind experiment and the advantage of the double-blind experiment than the blind experiment.

Answer to Problem 36E
In a blind experiment, people does not know whether they are part of the treatment
In a double-blind experiment, people know who is in the treatment and who is in the control group.
The advantage of the double-blind experiment is double blind experiments ensure impartiality and increase the reliability and validity of the experiment than the blind experiment.
Explanation of Solution
Calculation:
In a blind experiment only the people who take part does not know whether they are part of the treatment, whereas in a double-blind experiment both the person implementing the experiment and the participant are kept in the dark as to who is in the treatment and who is in the control group.
A possible advantage of the double blind experiment is that it is not possible for an experimenter, to influence experimental observations as he do not know who are the participants. Thus, double blind experiments ensure impartiality and increase the reliability and validity of the experiment.
Conclusion:
Therefore, in a blind experiment, people does not know whether they are part of the treatment
In a double-blind experiment, people know who is in the treatment and who is in the control group.
The advantage of the double-blind experiment is double blind experiments ensure impartiality and increase the reliability and validity of the experiment than the blind experiment.
Chapter 11 Solutions
BIG IDEAS MATH Algebra 2: Common Core Student Edition 2015
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