
Concept explainers
To Describe: The design of the experiment or observational study.

Answer to Problem 9CR
The topic is best investigated through an experiment. Randomly select same number of customers to be put into different groups. Give one group of people one type of bread and a different group a different type of bread. Record the number of customers from each group that returns.
Explanation of Solution
Given:
The scenario is which type of sandwich bread attracts the most repeat customers.
Calculation:
“A restaurant manager wants to known which type of bread attracts the most repeat customers.”
In an experiment, individuals are assigned at random to the treatment group or the control group.
In an observational study, random samples can be selected from the groups being studied.
This is best investigated through an experiment as there is treatment applied here which is different types of breads.
A possible design of an experiment for this case can be:
Randomly select same number of customers to be put into different groups. Give one group of people one type of bread and a different group a different type of bread. Record the number of customers from each group that returns.
Conclusion:
Hence, this topic is best investigated through experiment and the design is described.
Chapter 11 Solutions
Big Ideas Math A Bridge To Success Algebra 2: Student Edition 2015
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