A sample of 250 observations is selected from a normal population for which the population standard deviation
Question:
a. Determine the standard error of the mean.
b. Explain why we can use formula (9-1) to determine the 95% confidence interval.
c. Determine the 95% confidence interval for the population mean.
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Related Book For 
Basic Statistics For Business And Economics
ISBN: 9780073521473
8th Edition
Authors: Douglas Lind, William Marchal, Samuel Wathen
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