Question

The table shows results of a survey in which 2561 adults from Country A, 1103 from Country B, and 1092 adults from Country C were asked if human activity contributes to global warming.

Adults who say that human activity contributes to global warming

-Country A 68%

-Country B 88%

-Country C 93%

(a) Construct a 90% confidence interval for the proportion of adults from Country A who say human activity contributes to global warming ___,___?

(b) Construct a 90% confidence int3erval for the proportion of adults from Country B who say human activity contributes to global warming___,___?

(c) Construct a 90% confidence interval for the proportion of adults from Country C who say human activity contributes to global warming___,___?

Round answers to nearest 3 decimal places

Answer 1

We are 90% confident that the proportion of adults from Country A who say human activity contributes to global warming

-----------------------------------------------------------------------------------------------------------------------------------

We are 90% confident that the proportion of adults from Country B who say human activity contributes to global warming

-----------------------------------------------------------------------------------------------------------------------------------

We are 90% confident that the proportion of adults from Country C who say human activity contributes to global warming