Concept explainers
(a)
To explain why we think the results of the two studies are so different.
(a)
Explanation of Solution
We think the results of the two studies are so different because the first study used a voluntary response sample and thus the participants has to be willing to answer the question (truthfully) and those that did not wash their hands were probably less willing to admit this.
(b)
To explain why these precautions were taken by the observers.
(b)
Explanation of Solution
These precautions were taking such that the observers did not influence the participants to wash their hands.
Chapter 5 Solutions
Statistics Through Applications
Additional Math Textbook Solutions
Introductory Statistics
Statistical Reasoning for Everyday Life (5th Edition)
An Introduction to Mathematical Statistics and Its Applications (6th Edition)
Elementary Statistics: Picturing the World (6th Edition)
Basic Business Statistics, Student Value Edition (13th Edition)
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