Concept explainers
To find: The flaws in the design of the experiment.
Answer to Problem 5GP
The flaw is given below.
Explanation of Solution
The de-icer is more effectively when taking Minnesota as an experimental groups and California as the control group. Therefore the flaw is that Minnesota cities are colder cities than the California cities. This flaw could be corrected by selecting a random sample of all drivers from Minnesota.
Chapter 11 Solutions
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