The Morningstar Top Fund lists at the Morningstar.com website give the mean yearly return and the standard deviation of the returns for each of the listed funds. As given by Morningstar.com on March 17, 2005, the RS Internet Age Fund has a mean yearly return of 12.93 percent with a standard deviation of 43.96 percent; the Franklin Income A fund has a mean yearly return of 15 percent with a standard deviation of 9.81 percent; the Jacob Internet fund has a mean yearly return of 40.75 percent with a standard deviation of 43.12 percent.
For each mutual fund, find an interval in which you would expect 95.44 percent of all yearly returns to fall. Assume returns are normally distributed.