normally distributed

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.4: Distributions Of Data
Problem 19PFA
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4. The average return for largecap domestic stock funds over the three years 2009–2011
was 14.4% (aaii Journal, February, 2012). Assume the threeyear returns were normally
distributed
across funds with a standard deviation of 4.4%.
a. what is the probability an individual largecap domestic stock fund had a threeyear
return of at least 20%?
b. what is the probability an individual largecap domestic stock fund had a threeyear
return of 10% or less?
c. how big does the return have to be to put a domestic stock fund in the top 10% for the
threeyear period?

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