A random survey was conducted in 5 countries to determine people's beliefs on human contributions to...
A random survey was conducted in 5 countries to determine
people's beliefs on human contributions to global warming. The
following table shows the results from the survey asking if they
believed the activities of humans are contributing to an increase
in global temperatures.
Construct the 95% confidence interval for FRANCE.
Total people surveyed in the 5 countries: 7199
Total people surveyed in France: 1125
Proportion who indicate they believe humans are contributing to
Global temperature increases: 88%
Homework Answers
Sample proportion 
= 0.88
Sample size (n) = 1125
Confidence interval(in %) = 95
z @ 95% = 1.96
Since we know that
Required confidence interval = (0.88-0.019, 0.88+0.019)
Required confidence interval = (0.861, 0.899)
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