Chapter 1. How to Sample Badly

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Questions 1-2

0:57

Question 1.1

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Incorrect. Convenience samples, voluntary response samples and mall-intercept samples are not reliable sampling techniques.
Correct. Convenience samples, voluntary response samples and mall-intercept samples are not reliable sampling techniques.
Incorrect. Try again.
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Question 1.2

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Incorrect. A good sample requires individuals to be selected without human judgment. This requires using a random device to do the selection.
Correct. A good sample requires individuals to be selected without human judgment. This requires using a random device to do the selection.
Incorrect. Try again.
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Questions 3-6

2:50

Question 1.3

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Incorrect. When respondents self-select to respond, the sample is called a voluntary response sample.
Correct. When respondents self-select to respond, the sample is called a voluntary response sample.
Incorrect. Try again.
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Question 1.4

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Incorrect. When shoppers are interviewed at a mall, the survey is called a mall-intercept sample.
Correct. When shoppers are interviewed at a mall, the survey is called a mall-intercept sample.
Incorrect. Try again.
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Question 1.5

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Incorrect. Since the students were selected using a random device, the sample is a random sample.
Correct. Since the students were selected using a random device, the sample is a random sample.
Incorrect. Try again.
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Question 1.6

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Incorrect. Handing out survey forms to students in campus cafeterias is a convenience sample.
Correct. Handing out survey forms to students in campus cafeterias is a convenience sample.
Incorrect. Try again.
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Questions 7-8

3:51

Question 1.7

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Incorrect. When respondents are not selected using a random device, the method of selection often selects respondents of a certain characteristic which biases the results.
Correct. When respondents are not selected using a random device, the method of selection often selects respondents of a certain characteristic which biases the results.
Incorrect. Try again.
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Question 1.8

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Incorrect. Bias is defined as systematically favoring certain outcomes.
Correct. Bias is defined as systematically favoring certain outcomes.
Incorrect. Try again.
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