SOLUTION: A population mean is to be estimated from the sample described. Round your answer to one decimal place if necessary. Assume that all confidence intervals use a 95% confidence level

Question 1184866: A population mean is to be estimated from the sample described. Round your answer to one decimal place if necessary. Assume that all confidence intervals use a 95% confidence level.
Sample size = 3025, sample mean = 244, sample standard deviation = 80
What is the margin of error?
Answer by Boreal(15235) (Show Source): You can put this solution on YOUR website!
the margin of error is t(0.975, df=3024) which is essentially 1.96, the z-value * 80/sqrt(3025)
=1.96*80/55=2.85 is margin of error

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