1- Score: 0 of 5 pts 11 of 12 (6 complete) Hw Score: 37.5%, 15 of 40 pts E Quest
ID: 3314083 • Letter: 1
Question
1- Score: 0 of 5 pts 11 of 12 (6 complete) Hw Score: 37.5%, 15 of 40 pts E Question Help | * 6.3.21 The table to the right shows the results of a survey in which 2589 adults from Country A 1119 adults rom Counitry B, and 1061 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 64% 89% a) Construct a 90% confidence interval for the proportion of adult from Country A who say human activity contributes to global warming (0.624.0656) (Round to three decimal places as needed ) (b Construct a 90% confidence interval for the pro o tion of adults rom County B ito say numa act wity con routes, a bal aming Do 90% (Round to three decimal places as needed) for Counthr also please Enter your answer in the edit tields and then click Check Answer 1 Pemaining Clear All O Type here to searchExplanation / Answer
Ans:
a)For A,
90% confidence interval for p
=0.64+/-1.645*sqrt(0.64*0.36/2589)
=0.64+/-0.016
=(0.624,0.656)
b)
90% confidence interval for p
=0.89+/-1.645*sqrt(0.89*0.11/1119)
=0.89+/-0.015
=(0.875,0.905)
c)
90% confidence interval for p
=0.92+/-1.645*sqrt(0.92*0.08/1061)
=0.92+/-0.014
=(0.906,0.934)
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