The table to the right shows the results of a survey in which 2575

2575 adults from Country A, 1126

1126 adults from Country B, and 1072

1072 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 warning:

Country A= 64%

Country B= 89%

Country C= 94%

(a) Construct a 90% confidence interval for the proportion of adults from Country Upper A

CountryA who say human activity contributes to global warming.