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East West n1 = 40 n2 = 45  X bar = 72 (in $1,000)  X bar = 78 (in $1,000) s1 = 6 (in $1,000) s2 = 8 (in $1,000)   a. Develop an interval estimate for the difference between the

East West n1 = 40 n2 = 45  X bar = 72 (in $1,000)  X bar = 78 (in $1,000) s1 = 6 (in $1,000) s2 = 8 (in $1,000)   a. Develop an interval estimate for the difference between the

MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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In order to estimate the difference between the yearly incomes of marketing managers in the East and West of the United States, the following information was gathered.

 

East

West

n1 = 40

n2 = 45

 X bar = 72 (in $1,000)

 X bar = 78 (in $1,000)

s1 = 6 (in $1,000)

s2 = 8 (in $1,000)

 

a.

Develop an interval estimate for the difference between the average yearly incomes of the marketing managers in the East and West.  Use a = 0.05.

 

 

 

 

Give the upper boundary answer to two decimal points.  The lower boundary is -9.084   Give the upper boundary only.

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