Question
In a random sample of 25 people, the mean commute time to work was 30.8 minutes and the standard deviation was 7.2 minutes. Assume the
In a random sample of 25 people, the mean commute time to work was 30.8 minutes and the standard deviation was 7.2 minutes. Assume the population is normally distributed and use a t-distribution to construct a 80% confidence interval for the population mean . What is the margin of error of ?
The margin of error of is ____ . (Round to one decimal place as needed.)
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Fundamentals of Investments
Authors: Gordon J. Alexander, William F. Sharpe, Jeffery V. Bailey
3rd edition
132926172, 978-0132926171
