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Mathematics 12 Online
OpenStudy (anonymous):

The Spokesman-Review wants to know the public opinion on the construction of a new library downtown. It is decided that 48 people will be surveyed using a simple random sample. Which of the following will produce a simple random sample?

OpenStudy (tkhunny):

That's easy. The one that doesn't contain selection bias. Even if you do have selection bias, folks in Spokane are pretty fair minded. You may get a valid result, anyway. :-)

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