
To find: design of experiment or observational study.

Answer to Problem 7E
Then, randomly choose one group of individuals who do not smoke.
Now, find body mass index of the individuals is each group.
Explanation of Solution
Given: A researcher wants to compare the body mass index of smokers and non smokers.
Calculation: 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 observational study as there is no treatment applied in it.
A possible design of observational study for thus case can be:
Randomly choose one group of individuals who smoke.
Then, randomly choose one group of individuals who do not smoke.
Now, find body mass index of the individuals is each group.
Conclusion:
Then, randomly choose one group of individuals who do not smoke.
Now, find body mass index of the individuals is each group.
Chapter 11 Solutions
BIG IDEAS MATH Algebra 2: Common Core Student Edition 2015
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