Question: The data below records the rates of return for the S&P stock index and stocks for two companies, StatFab and RobCo. One measure of the volatility (or riskiness) of a stock is how dramatically it varies as the S&P varies – that is, a stocks “beta.” (See http://en.wikipedia.org/wiki/Beta_finance.) One definition of a stock’s beta is the slope of the line regressing the rates of return of the stock vs. the S&P. Which of these two securities is more volatile according to this measure? (Again, you can copy this data into Excel.)