Edit View History Bookkmarks Develop Window Help ? 50%--> Sun 1:20 PM g Garry Ja

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Edit View History Bookkmarks Develop Window Help ? 50%--> Sun 1:20 PM g Garry Jackson1 8/17/18 1:19 Math 115 Introductory Statistics-Summer 2018 Homework: Homework 11 section 3.2 Score: 0 of 1 pt 9 of 9 ( complete) Y Score: 6534%, 5.88 o 3.2.30 Question Help Aontain standardized tests m th scores have a beltagedderibution wraman of 530 and a dandrd d ason of 110.Conpet, par a)trough(e (a) What peroentage of standardized best scores is between 200 and 8607 (Round to one decimal place as needed.) one decimal place as nodod) Enter your answer in the answer box and then click Check Arswer pasan Clear Al Check Answer ? ,, 5 8 9

Explanation / Answer

Ans:

Given that

mean=530

standard deviation=110

z(200)=(200-530)/110=-3

z(860)=(860-530)/110=3

P(-3<z<3)=P(z<3)-P(z<-3)

=0.99865-0.00135=0.9973 or 99.73%

99.7% of the scores falls between 200 and 860.

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