What are the principal things about telephone surveys that make it difficult to draw a sample that is random, thereby undermining the validity of the research? How could you address these problems?
What will be an ideal response?
An ideal response will:
1, Define random sampling and validity.
2, Explain how telephone surveys prevent random sampling or are unable to equally sample relevant population groups. This may include issues such as certain representative groups not having landlines, the problem of caller ID, or cell phone usage.
3, Present possible solutions to these problems, such as population weighting.
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