The table to the right shows the results of a survey in which 2564 adults from Country A,
The table to the right shows the results of a survey in which 2564 adults from Country A, 1121 adults
from Country B, and 1083 adults from Country C were asked if human activity contributes to global warming. Complete parts (a), (b), and (c).
1. Construct a 90% 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.
2. Construct a 90% confidence interval for the proportion of adults from Country B who say human activity contributes to global warming. (Round to three decimal places as needed.
3. Construct a 90% confidence interval for the proportion of adults from Country C who say human activity contributes to global warming. (Round to three decimal places as needed.)
| Adults who say that human activity contributes to global warming | |
| Country A | 65% |
| Country B | 88% |
| Country C | 94% |
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