Question
Environmental engineers are using data collected by weather data centers to learn how climate affects the sea ice. Of 543 ice melt ponds studied in
Environmental engineers are using data collected by weather data centers to learn how climate affects the sea ice. Of 543 ice melt ponds studied in a certainregion, 100 were classified as having"first-year ice". The researchers estimated that about 18% of melt ponds in the region havefirst-year ice.Estimate, with90% confidence, the percentage of allice-melt ponds in the region that havefirst-year ice. Give a practical interpretation of the results.
Construct a90% confidence interval around the sample proportion of ice melt ponds withfirst-year ice.
( , )
(Round to four decimal places asneeded.)
Interpret the confidence interval practically. Choose the correct answer below.
A.
Since 18% is not in theinterval, one can be90% confident the true proportion of ice melt ponds in the region withfirst-year ice is not 18%.
B.
One can be90% confident the true proportion of ice melt ponds in the region withfirst-year ice is within the aboveinterval, though it is probably not 18%.
C.
One can be90% confident the true proportion of ice melt ponds in the region withfirst-year ice is within the aboveinterval, and there is a90% chance it is 18%.
D.
Since 18% is in theinterval, one can be90% confident the true proportion of ice melt ponds in the region withfirst-year ice is 18%.
E.
One can be90% confident the true proportion of ice melt ponds in the region withfirst-year ice lies at the mean of the aboveinterval, rather than at 18%.
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