Concept explainers
(a)
To identify: The type of sample described.
(a)
Answer to Problem 11Q
The type of sample is a convenience sample.
Explanation of Solution
Given:
The station surveys people at a nearby sports stadium.
Calculation:
In this case the station surveyed the people at a nearby sports stadium.
Thus, they selected those people for the survey who were readily available and easy to reach. So this sample is a convenience sample.
Conclusion:
Hence, the type of sample is a convenience sample.
(b)
To find: whether the sample is biased or not
(b)
Answer to Problem 11Q
It is a biased sample.
Explanation of Solution
Given:
The station surveys people at a nearby sports stadium.
Calculation:
This sample includes people who are at stadium and they are more likely to watch sporting events on television than the people who never go to a sports stadium.
Thus, this sample does not represent population accurately.
Hence, it is a biased sample.
Conclusion:
Hence, it is a biased sample.
(c)
To describe: The method for selecting a random sample.
(c)
Answer to Problem 11Q
The method is based on gender, one male and other female. Randomly select
Explanation of Solution
Given:
The station surveys people at a nearby sports stadium.
Calculation:
To select a random sample of
Conclusion:
Hence, themethod is based on gender, one male and other female. Randomly select
Chapter 11 Solutions
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