6.3.21 Question Help The table to the right shows the results of a survey in whi

Question

6.3.21 Question Help The table to the right shows the results of a survey in which 2567 adults from Country A, 1111 adults from Country B, and 1082 adults from Country C were asked if human activity contributes to globall warming. Complete parts (a), (b), and (c) Adults who say that human activity contributes to p global Country B Country C 85% 95% a) Construct a 99% confidence interval for the proportion of adults from Country A who say human activity contributes to global warming. (Round to three decimal places as needed.)

Explanation / Answer

Margion fo error = 2.576 *sqrt(0.64 *(1-0.64)/2567) =0.024

99% CI = 0.64 +/- 0.024 = (0.64 -0.024, 0.64+0.024) =(0.616, 0.664)

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