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# confidence interval for the standard deviation

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A financial analyst, known for her excellent track record, has decided to part company with her old partners and to enter the venture capital area. In it's publicity brochure, the firm she joins lists the market adjusted rate of return that their new partner achieved during her previous tenure. The table below shows these returns:

Year Market Adjusted Return (%)

1982 14.17
1983 16.54
1984 18.88
1985 -2.69
1986 2.65
1987 5.65
1988 18.47
1989 8.89
1990 -6.97
1991 10.57
1992 2.32
1993 -0.08

Compute a 95% confidence interval for the standard deviation of the above data.

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##### Solution Summary

Computes a 95% confidence interval for the standard deviation of the data given.

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A financial analyst, known for her excellent track record, has decided to part company with her old partners and to enter the venture capital area. In it's publicity brochure, the firm she joins lists the market adjusted rate of return that their new partner achieved during her previous tenure. The table below shows these returns:

Year Market Adjusted Return ...

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