Question

The table to the right shows the results of a survey in which 2566 adults from Country? A, 1150 adults from Country? B, and 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 warming Country Upper A 60 ?% Country Upper B 87 ?% Country Upper C 91 ?% ?(a) Construct a 95 ?% confidence interval for the proportion of adults from Country Upper A who say human activity contributes to global warming. left parenthesis nothing comma nothing right parenthesis ?(Round to three decimal places as? needed.) ?(b) Construct a 95 ?% confidence interval for the proportion of adults from Country Upper B who say human activity contributes to global warming. left parenthesis nothing comma nothing right parenthesis ?(Round to three decimal places as? needed.) ?(c) Construct a 95 ?% confidence interval for the proportion of adults from Country Upper C who say human activity contributes to global warming. left parenthesis nothing comma nothing right parenthesis ?(Round to three decimal places as? needed.) Enter your answer in each of the answer boxes.

Answer 1

Confidence interval is given by,

Z-value for 95% onfidence interval is 1.96

a) Given, p=0.6

Confidence interval is

(0.581, 0.619)

b) Given p=0.87.

Confidence interval is

(0.851, 0.889)

c) Given, p=0.91

Confidence interval is

(0.893, 0.927)