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Concept explainers
To Describe: The improvement of a problem with the experimental design.
![Check Mark](/static/check-mark.png)
Answer to Problem 10CR
The members of the population should be randomly selected for the study.
Explanation of Solution
Given:
The researcher asks for sixteen volunteers who have insomnia. Eight volunteers are given the sleeping pill and the other eight volunteers are given a placebo. Results are recorded for one month.
Calculation:
In an experiment, individuals are assigned to random to the treatment group or the control group. All the other variables are kept constant.
There is a problem with this experimental design.
The problem is that the volunteers may not be representative of the population. Thus it is not possible to see such an effect with the experiment the way it is designed.
One possible improvement is that the members of the population should be randomly selected for the study.
Conclusion:
Hence, the members of the population should be randomly selected for the study.
Chapter 11 Solutions
Big Ideas Math A Bridge To Success Algebra 2: Student Edition 2015
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