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January 20, 2004
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From MSNBC: Why polls have to be random to be valid and what margin of error means.
Posted by eubie at 8:37 PM permalink
« January 19, 2004 | Main | January 22, 2004 »
From MSNBC: Why polls have to be random to be valid and what margin of error means.
Posted by eubie at 8:37 PM permalink