Given the following hypothetical returns of large companies and T-bill between 2007 and 2012. Please calculate the average return and standard deviation of both large companies.
Year Large co. stock return T-bill return
2007 –14.69% 7.29%
2008 –26.47 7.99
2009 37.23 5.87
2010 23.93 5.07
2011 –7.16 5.45
2012 6.57 7.64