Mutual fund returns. In the last quarter of 2007, a group of 64 mutual funds had a mean return of 2.4% with a standard deviation of 5.6%. If a Normal model can be used to model them, what percent of the funds would you expect to be in each region?

Be sure to draw a picture first.

a) Returns of 8.0% or more

b) Returns of 2.4% or less

c) Returns between 8.8% and 13.6%

d) Returns of more than 19.2%