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Posted: March 9th, 2023

The population consists of the grades of all students

The population consists of the grades of all students who have taken Econ/Bus 230 in the last 5 years.The population mean is unknown. The population standard deviation is 20. A sample of 100 students istaken and the average grade is 82. Find(a) 90.1% confidence interval and the associated margin of error.(b) 95% confidence interval and the associated margin of error.(c) 99.02% confidence interval and the associated margin of error.

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