8.18 Stem cell research A Harris poll of a random sample of 2113 adults in the United...

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8.18 Stem cell research A Harris poll of a random sample of 2113 adults in the United States in October 2010 reported that 72% of those polled believe that stem cell research has merit. (Source: www.harrisinteractive.com/vault/

Harris-Interactive-Poll-HealthDay-2010-10.pdf.) The results, presented using MINITAB software, are

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8.19 z-score and confidence level Which z-score is used in a

(a) 90%,

(b) 98%, and

(c) 99.9% confidence interval for a population proportion?

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Statistics The Art And Science Of Learning From Data

ISBN: 9781292164878

4th Global Edition

Authors: Alan Agresti, Christine A. Franklin, Bernhard Klingenberg

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