The table to the right shows the results of a survey in which 2572 adults from.

Question

The table to the right shows the results of a survey in which 2572 adults from. country A, 1150 adults from country B, and 1061 adults from country C were asked if human activity contributes to global warming.
complete part a,b, and c.
table:Adults who say that human activity contributes to global warming.
Country A, 65%
Country B, 89%
Country C, 91%
(a) Construct a 99% confidence interval for the proportion of adults from country A who say human activity contributes to global warming.
round to 3 decimal places as needed.

Explanation / Answer

here total number of people =2572

for estimated sample propotion p=0.65

hence std error =(p(1-p)/n)1/2 =0.0094

for 99% confidence interval ; z=2.5758

hence 99% confidence interval =estimated proportion -/+ z*std error =0.626 ; 0.674

Related Questions

Navigate

• Browse (All)
• Browse T
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.