Stock investors often look to beat the performance of the S&P 500 Index, which generally serves as a yardstick for the market as a whole. The following table shows a comparison of the five-year cumulative total shareholder returns for IDACORP common stock, the S&P 500 Index, and the Edison Electric Institute (EEI) Electric Utilities Index. The data assume that $100 was invested on December 31, 2002, with beginning-of-period weighting of the peer group indices (based on market capitalization) and monthly compounding of returns ( Source: IDACORP 2007 Annual Report).

Using the information provided, construct appropriate statistical measures that illustrate the performance of the three investments. How well has IDACORP performed over the time periods compared to the S&P 500? How well has it performed relative to its industry as measured by the returns of the EEI Electric Utilities Index?

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EEl Electric Year IDACORP (S) S&P 500 (S)Utilities Index (S) 2002 2003 2004 2005 2006 2007 100.00 128.86 137.11 136.92 186.71 176.26 100.00 128.67 142.65 149.66 173.27 182.78 00.00 123.48 151.68 76.02 212.56 247.76