In the last quarter of​ 2007, a group of 64 mutual funds had amean return of 5.9% with a standard deviation of 7.1​%.
If a normal model can be used to model​ them, what percent ofthe funds would you expect to be in each​ region? Use the​68-95-99.7 rule to approximate the probabilities rather than usingtechnology to find the values more precisely. Be sure to draw apicture first.
| ​a) Returns of negative −1.2​% or less | ​b) Returns of 5.9​% or more |
| ​c) Returns between negative −8.3​% and 20.1​% | ​d) Returns of more than 27.227.2​% |
