Question: The following table shows the annual returns in percent for

The following table shows the annual returns (in percent) for the Vanguard Energy Fund.
Year Return
2005...... 44.60
2006...... 19.68
2007...... 37.00
2008...... 242.87
2009...... 38.36
a. Calculate the point estimate for µ.
b. Construct the 95% confidence interval for µ.
c. What assumption did you make when constructing the interval?


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  • CreatedJanuary 28, 2015
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