
Concept explainers
To explain the evidence which shows each of the three types of variations is present in the experiment.

Explanation of Solution
Given:
First, we will understand which are the three types of variations then we will explain one by one. The tires with Air/nitrogen, their brand and the difference among the tires.
Therefore, 1) Air/Nitrogen: this is made obvious in the table because each has their own column and the numbers are not identical, thus this is definitely part of the variation.
2)Brands: in a given table, there are different brands.Therefore, this is definitely part of the variation.
3) Differences among tires: for example, a tire that has a small imperfection compared to a perfect tire will have higher values, thus this is definitely part of the variation.
Chapter 1 Solutions
EBK STATISTICS THROUGH APPLICATIONS
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