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  3. in the last quarter of​ 2007, a group of 64

In the last quarter of​ 2007, a group of 64 mutual funds had a mean return...

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Statistics

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​%

Answer & Explanation Solved by verified expert
3.8 Ratings (558 Votes)
a 12 59 71 that is 1 standard deviation less than themean Using the 6895997 rule of the normal distribution we knowthat 68 of the observations lies within 1 standard deviation ofthe    See Answer
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