Chegg Stu Chegg Tut History Bookmarks Window Help MGT 2216 Spring 2018 TTh Josep

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Chegg Stu Chegg Tut History Bookmarks Window Help MGT 2216 Spring 2018 TTh Joseph Knight&1 2818 8:58 PM Homework: Chapter 7: 1-2 Score: 0 of 1 pt 7.1.23 Save 5 of 8 (4 completel MN Score: 48.44%, 3.88 of 8 pts Question Help inte last qater of 2007, agrup of 64 mutual funds had a mean retum of 57% win a simdard deviatin of 65% tao malmodel an be used to model then what percent of the funds would you expect to be in each rogion? Use the 68-96-99.7 rule to approximate the probabiltes rather than values more precisely. Be sure to draw a picture fist using technology to find the a)Returns of 12.2% or more c)Returns between-138%and 25.2% b)Rehms of 67% or more d)Raums of more tan 18.7% a)The expected perortage of returns hat aro 122% ormore isl Type an integer or a decimal.) Enter your answer in the answer box and then click Check Answer Clear Al 535 rage38 21428571 Count 54 FS

Explanation / Answer

a) P(X > 12.2%)

= P(z > (12.2 - 5.7)/6.5)

= P(z > 1)

= 0.16

b) P(X > 5.7%)

= P(z > (5.7 - 5.7)/6.5)

= P(z > 0)

= 0.50

c) P(-13.8% < X < 25.2%)

= P((-13.8 - 5.7)/6.5 < z < (25.2 - 5.7)/6.5)

= P(-3 < z < 3)

= 0.997

d) P(X > 18.7%)

= P(z > (18.7 - 5.7)/6.5)

= P(z > 2)

= 0.025

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