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December 22, 2014

December 22, 2014

Posted by **Anonymous** on Tuesday, August 23, 2011 at 1:07pm.

- stats -
**PsyDAG**, Tuesday, August 23, 2011 at 1:24pmHow does he find a population to make random choices from? Who has phones that are listed in the phone book? Even more problematic, who doesn't, so the sample will be biased? People without phones? Unlisted numbers? Cell phones?

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