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January 25, 2015

January 25, 2015

Posted by **Zodra** on Monday, August 23, 2010 at 6:18pm.

- Statistics -
**MathGuru**, Monday, August 23, 2010 at 7:19pmTo reduce the width of a confidence interval in half, you have to multiply the sample size by 4 (in effect quadrupling the sample size).

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