A certain risk-averse investor calculates the beta for a stock before investing in the stock. By regressing the weekly percent returnof, say, Stock A on the weekly percent return of the Standard and Poor's 500 index(S&P 500), the investor can determine the stock's beta, which is equal to the slope of the regression line. a) A slope greater than one indicates that the stock is more volatile than S&P market index. Is there sufficient evidence to conclude that the stock is more volatile than the S&P market index? 看不太懂在问什麽?是否可以帮忙解说一下，查了英文还是不知道说什麽? 是要检定 β=0 还是..... 谢谢!! -- --

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