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Do Homework Allyson Kitz Microsolt Edge ps://www.mathxl.com/student/PlayerHomework.aspx?homeworkid-4844023338questionld- 1&flushed-false; MAT 152 Online Summer 2018 Homework: Section 9.1 Score: 0 of 1 pt 9.1.15 Construct a confidence interval of the population proportion at the given level of confidence. 4 of8 (2 co x = 120, n = 200, 90% confidence The lower bound is The upper bound is (Round to three decimal places as needed) Enter your answer in the edit fields and then click Check Answer. Type here to search

Explanation / Answer

X= 120
n= 200
p-hat = X/n= 0.600

ALPHA= 10.00%
z(a/2)
z(0.1/2)
1.645

ME= z(a/2)*sqrt(p*(1-p)/n)
1.645*SQRT(0.6*(1-0.6)/200)
0.0570

CI = p +- ME
lower =0.6-0.057= 0.543
upper =0.6+0.057= 0.657

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