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The Following Table Shows the Annual Returns (In Percent)for the Fidelity

Question 74

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The following table shows the annual returns (in percent)for the Fidelity Utilities fund from 2006 through 2010. The following table shows the annual returns (in percent)for the Fidelity Utilities fund from 2006 through 2010. A)Calculate the point estimate of σ. B)Construct a 95% confidence interval of σ.
A)Calculate the point estimate of σ.
B)Construct a 95% confidence interval of σ.

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a.s2 = 604....

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