Question

the table to the right shows the results of a survey in which

2559 adults from country a,
1118 adults from country b, and
1077 adults from country c were asked if human activity contributes to global warming. complete parts (a), (b), and (c).

adults who say that human activity contributes to global warming

country upper a
country a

60%
country upper b
country b
86%
country upper c
country c
92%
(a) construct a
99% confidence interval for the proportion of adults from
country upper a
country a who say human activity contributes to global warming.