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? Use the 68-95-99.7 rule to approximate the probabilities rather than using technology to find the values more precisely. Be sure to draw a picture first.

a) Returns of 3.2% or less	b) Returns of 2.4% or more
c) Returns between 14.4% and 19.2%	d) Returns of less than 8.8%