a)
To explain whether the sampling error or a non-sampling error.
a)
Answer to Problem 30E
Non-sampling error
Explanation of Solution
Given:
The subject lies about past drug use.
First need to know about the sampling and non-sampling error.
Sampling error: It is caused by incorrectly selecting the individuals for the sample.
Non-sampling error: This error does not base on the selection of individuals for the sample.
Therefore, the subject lies about past drug is not based on the selection. Hence, it is a non-sampling error.
b)
To explain whether the sampling error or a non-sampling error.
b)
Answer to Problem 30E
Non-sampling error
Explanation of Solution
Given:
A typing error is made in recording the data.
First need to know about the sampling and non-sampling error.
Sampling error: It is caused by incorrectly selecting the individuals for the sample.
Non-sampling error: This error does not base on the selection of individuals for the sample.
Therefore, the typing error is not based on the selection. Hence, it is a non-sampling error.
c)
To explain whether the sampling error or a non-sampling error.
c)
Answer to Problem 30E
Sampling error
Explanation of Solution
Given:
Data are gathered by asking people to mail in a coupon printed in a newspaper.
First need to know about the sampling and non-sampling error.
Sampling error: It is caused by incorrectly selecting the individuals for the sample.
Non-sampling error: This error does not base on the selection of individuals for the sample.
Therefore, the data is collected by mail only which does not be a representative of the population. So, it is based on the selection. Hence, it is a sampling error.
Chapter 4 Solutions
The Practice of Statistics for AP - 4th Edition
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