The table to the right shows the results of a survey in which 2558

adults from CountryA,1103

adults from CountryB, and 1078

adults from Country C were asked if human activity contributes to global warming. Complete parts(a), (b), and(c).

(a) Construct a 90%confidence interval for the proportion of adults from CountryA who say human activity contributes to global warming.

(b) Construct a 90% confidence interval for the proportion of adults from CountryB who say human activity contributes to global warming.

(C) Construct a 90% confidence interval for the proportion of adults fromCountryC who say human activity contributes to global warming.

Adults who say that human activity contributes to global warming

CountryA 67% CountryB 90% CountryC 95%`