Concept explainers
a.
To explain: The reason of not using simple random method in the survey.
a.
Explanation of Solution
Given:
It has been found in the survey that there are 34% adults who believe that steroid is used by the MLB players to increase their performance. Also, there are 36% adults think that steroid is used by players and 80% did not have no opinion.
The provided survey is not a simple random people because the person not having the telephone are not be included in the survey. All the people do not have equal chances of being chosen thus, the sampling method is not simple random sample.
b.
To explain: The reason of selecting one adult from each household to respond the survey.
b.
Explanation of Solution
If call is made then there is a possibility that few adults would take the call more frequently than others and there is a possibility to have the differences in the opinions.
c.
To explain: The ways in which under coverage could lead biasness
c.
Explanation of Solution
Here all the people have not been included in the survey because of the not having the telephones to all the individuals. Thus, large portion of the population has been missed that may cause biasness.
Chapter 4 Solutions
The Practice of Statistics for AP - 4th Edition
Additional Math Textbook Solutions
Essentials of Statistics (6th Edition)
Statistics for Psychology
Statistics: The Art and Science of Learning from Data (4th Edition)
Statistical Reasoning for Everyday Life (5th Edition)
Introductory Statistics (10th Edition)
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