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* 87% 0 Sun 1:49 PM Q = Chrome File Edit View History Bookmarks People Window Help Take a Test - Montana Maher BÀ My GXD A Secure https://www.mathxl.com/Student/PlayerTest.aspx?testid=179729830¢erwin;=yes c 6 openvellum. BBA403-A01&A02;_Spring 2018 Montana Maher 2 | 3/11/18 1:49 PM Scans-09-27-2017 -120226...ed) 1.jpg Submit Test Test: Exam 1 MyLab Statistics This Question: 1 pt 6 of 6 (0 complete) Y This Test: 6 pts possible - that IE Question Help Scans-09-27-2017 -120226...ed) 2.jpg og The table to the right shows the results of a survey in which 2550 adults from Country A, 1132 adults from Country B, and 1060 adults from Country C were asked if human activity contributes to global warming. Complete parts (a), (b), and (c). Adults who say that humane activity contributes to global warming Country A 63% Country B 89% Country C 91% IMG_2066.jpg LEHMA COLLEGE (a) Construct a 99% confidence interval for the proportion of adults from Country A who say human activity contributes to global warming- O My Courses (O) (Round to three decimal places as needed.) (b) Construct a 99% confidence interval for the proportion of adults from Country B who say human activity contributes to global warming- () (Round to three decimal places as needed.) ANDREA.jpg Course Home Homework (c) Construct a 99% confidence interval for the proportion of adults from Country C who say human activity contributes to global warming- Quizzes & Tests (II) (Round to three decimal places as needed.) IMG_2067.jpg Study Plan Gradebook StatCrunch + Chapter Contents IMG_2068.jpg Tools for Success Multimedia Library Enter your answer in each of the answer boxes. Purchase Options IMG_2069.jpg D Lalo 3 - Introduction a...pptx 9P S 1OI OM O AOG OPO = MP3 DOBREMEERIExplanation / Answer
At 99% confidence interval the critical value is z0.005 = 2.58
a) The 99% confidence interval for the country A is
p +/- z0.005 * sqrt(p * (1 - p)/n)
= 0.63 +/- 2.58 * sqrt((0.63 * (1 - 0.63)/2550)
= 0.63 +/- 0.025
= 0.605, 0.655
b) The 99% confidence interval for the country A is
p +/- z0.005 * sqrt(p * (1 - p)/n)
= 0.89 +/- 2.58 * sqrt((0.89 * (1 - 0.89)/1132)
= 0.89 +/- 0.024
= 0.866, 0.914
c) The 99% confidence interval for the country A is
p +/- z0.005 * sqrt(p * (1 - p)/n)
= 0.91 +/- 2.58 * sqrt((0.91 * (1 - 0.91)/1080)
= 0.89 +/- 0.022
= 0.868, 0.912
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