
Concept explainers
Explain whether each situation represents an experiment or an observational study and if it is an experiment find the control group and the treatment group.

Answer to Problem 76SR
It is an observational study.
Explanation of Solution
Given:
It is given in the question that there are
Since, in this case the players are playing soccer and the person have to observing their play and only compare the time spent sleeping. It is observing an already formed group. It has not changing anything, just observing.
Hence, it is an observational study because here it has to do only observe.
Chapter 12 Solutions
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