When You Hear the Margin of Error Is Plus or Minus 3 Percent, Think 7 Instead – The New York Times

January 22, 2017

https://www.nytimes.com/2016/10/06/upshot/when-you-hear-the-margin-of-error-is-plus-or-minus-3-percent-think-7-instead.html?smid=tw-share

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