Question 872474: 15. The table to the right shows the results of a survey in which 2564 adults from Country A, 1120 adults from Country B, and 1085 adults from Country C were asked if human activity contributes to global warming. Complete parts (a), (b), and (c).
country a=65%
country b=86%
country c=93%
a. Construct a 99% confidence interval for the proportion of adults from Country A who say human activity contributes to global warming.
b. Construct a 99% confidence interval for the proportion of adults from Country B who say human activity contributes to global warming.
c. Construct a 99% confidence interval for the proportion of adults from Country B who say human activity contributes to global warming.
Answer by ewatrrr(24785)   (Show Source):
You can put this solution on YOUR website! a) ME(in Percent) = 2.58 sqrt(.65*.35/2564), CI: 65%-ME < p < 65% + ME
b) ME(in Percent) = 2.58 sqrt(.86*.14/1120), CI: 86%-ME < p < 86% + ME
c) ME(in Percent) = 2.58 sqrt(.93*.07/1085), CI: 93%-ME < p < 93% + ME
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