3. A sample of 50 earthquakes have depths with a mean of 9.808km. Assume the population standard deviation is 5.013km.
a. Construct a 98% confidence interval estimate of the mean of all such depths.
b. Determine the margin of error.
c. write a brief statement that interprets the interval.
3
Given,
b.
Confidence level = 0.98
Margin of error =
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a.
98% confidence interval is
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c.
Interpretation: We are 98% confident that the average depth of earthquake is lies between 8.16 km to 11.46 km.
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