GER QUIZ 5
Note: Answers may not be 100% correct, copy at your own risk
1) Sherry wants to find out what is the average time NUS students spend on watching YouTube videos.
By sampling more subjects, she will reduce the systematic error of her estimate.
The statement in bold is _____.
Ans: False.
Explanation: Sampling more subjects would not reduce systematic error
2) Martin conducted a survey using a multistage sampling plan to find out what is the average time NUS students spend on watching YouTube videos. In the first stage, he randomly selected 20 modules. In the second stage, he requested the respective module coordinators to get volunteers from their classes to participate in the survey. This is a _____ sampling scheme.
Ans: Non-probability sampling
Explanation: Volunteering aka Self-Selection immediately results in non-probability sampling
3) Cory wants to find out what is the average time GER1000 students spend on watching YouTube videos. He obtained the list of email addresses of all students enrolled in GER1000 from the module coordinator, then sent a questionnaire to every address in the list. Mary commented that John is conducting a census. Mary’s conclusion is ____?
Ans: True
Explanation: Census refers to collection of data of ALL individuals
4) "Probability sampling is preferred over non-probability sampling as it will ensure that each sampling unit in the frame has equal probability to be selected."
The above statement is _____.
Ans: True
Explanation: The big difference is that in probability sampling all persons have a chance of being selected, and results are more likely to accurately reflect the entire population.
5) A sampling frame should be ______ the target population so as to not lose generalisability of the results from the sample to the population.
i. equal to
ii. smaller than
iii. larger than
Ans: equal to or larger than
Explanation: It has to cover exactly or bigger than the target population so that every unit in the population has a chance of being selected.
--roud 2
GER QUIZ 5
Note: Answers may not be 100% correct, copy at your own risk
1) Sherry wants to find out what is the average time NUS students spend on watching YouTube videos.
By sampling more subjects, she will reduce the systematic error of her estimate.
The statement in bold is _____.
Ans: False.
Explanation: Sampling more subjects would not reduce systematic error
2) Martin conducted a survey using a multistage sampling plan to find out what is the average time NUS students spend on watching YouTube videos. In the first stage, he randomly selected 20 modules. In the second stage, he requested the respective module coordinators to get volunteers from their classes to participate in the survey. This is a _____ sampling scheme.
Ans: Non-probability sampling
Explanation: Volunteering aka Self-Selection immediately results in non-probability sampling
3) Cory wants to find out what is the average time GER1000 students spend on watching YouTube videos. He obtained the list of email addresses of all students enrolled in GER1000 from the module coordinator, then sent a questionnaire to every address in the list. Mary commented that John is conducting a census. Mary’s conclusion is ____?
Ans: True
Explanation: Census refers to collection of data of ALL individuals
4) "Probability sampling is preferred over non-probability sampling as it will ensure that each sampling unit in the frame has equal probability to be selected."
The above statement is _____.
Ans: True
Explanation: The big difference is that in probability sampling all persons have a chance of being selected, and results are more likely to accurately reflect the entire population.
5) A sampling frame should be ______ the target population so as to not lose generalisability of the results from the sample to the population.
i. equal to
ii. smaller than
iii. larger than
Ans: equal to or larger than
Explanation: It has to cover exactly or bigger than the target population so that every unit in the population has a chance of being selected.
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