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The editor of a magazine wishes to obtain the views of a random sample of readers about the future of the magazine.

a) A sub-editor proposes that they include in one issue of the magazine a questionnaire for readers to complete and return. Give two reasons why the readers who return the questionnaire would not form a random sample.

The editor decides to use a table of random numbers to select a random sample of 50 readers from the 7302 regular readers. These regular readers are numbered from 1 to 7302. The first few random numbers which the editor obtains from the table are as follows.

49757, 80239, 52038, 60882

b) Use these random numbers to select the first three members in the sample.

پاسخ تشریحی :
نمایش پاسخ

a) Only the more committed

or less busy etc

Only readers of that particular issue

b) Three randomly generated 4-digit numbers given

4975   3952   (0)386

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