The following table shows the annual returns (in percent) for the Vanguard Energy Fund. YearReturn 2005......44.60 2006......19.68

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The following table shows the annual returns (in percent) for the Vanguard Energy Fund.

YearReturn

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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Essentials Of Business Statistics Communicating With Numbers

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Authors: Sanjiv Jaggia, Alison Kelly

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Question Posted: Jan 28, 2015 10:08 AM

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The following table shows the annual returns (in percent) for the Vanguard Energy Fund. YearReturn 2005......44.60 2006......19.68

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a x 446 1968 3836 5 1935 b t 2 df t 00254 2776 19...View the full answer

Essentials Of Business Statistics Communicating With Numbers

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