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17 August, 16:14

In the following scenario describe the target population, sample frame, sample unit and observation unit. Discuss any possible sources of selection bias or inaccuracy of responses. Entries in the online encyclopediaWikipedia can be written or edited by anyone with Internet access. This has given rise to concern about the accuracy of the information. Giles (2005) reports on a Nature study assessing the accuracy of Wikipedia science articles. Fifty subjects were chosen "on a broad range of scientific disciplines." For each subject, the entries from Wikipedia and Encyclopaedia Brittanica were sent to a relevant expert; 42 sets of usable reviews were returned. The editors of Nature then tallied the number of errors reported for each encyclopedia.

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  1. 17 August, 19:25
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    a) Target population: Entries in the online encyclopedia Wikipedia.

    b) Sample frame: Fifty subjects chosen on a broad range of scientific disciplines.

    c) Sample Unit: Entries from Wikipedia and Encyclopedia

    d) Observation Unit: 42 sets of usable or inaccuracy of responses returned

    e) Selection bias: This can come from the initial perception that the online encyclopedia Wikipedia can be written by anyone with internet access. This will usually create a level of bias for and against some contents and will cause inaccuracy in the tallies of number of errors.

    Step-by-step explanation:

    a) The interest is the entries in the online encyclopedia Wikipedia. The become the target content for the study. Hence, the target population.

    b) The sample frame is the list of content need to access the accuracy of the content posted on the platform of the Wikipedia encyclopedia. Thus, the fifty subject chosen are the sample frame. That is, the frame of study contents.

    c) The sample units constitute the entries coming in from the fifty chosen contents.

    d) The observe 42 sets eventually.

    e) The selection bias are human bias inherent in the study or content selection.
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