MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN: 9781119256830
Author: Amos Gilat
Publisher: John Wiley & Sons Inc
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Part 1
A bank developed a model for predicting the average checking and savings account balance as
balance=−17,091+386×age+1,466×years
education+0.116×household
wealth.
a. Explain how to interpret the numbers in this model.
b. Suppose that a customer is
36 years​ old, is a college graduate​ (so that years
education=16​), and has a household wealth of ​$150,000.
What is the predicted bank balance?
 
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Part 1
a. The number
−17,091
 
The number
386
 
 does not have a meaningful interpretation.
means that the average account balance decreases by $386 for each year increase in education.
means that the average account balance decreases by $386 for each year increase in age.
means that the average account balance increases by $386 for each year increase in education.
means that the average account balance increases by $386 for each year increase in age.
 
The number
1,466
 
means that the average account balance decreases by $1,466 for each year increase in education.
means that the average account balance increases by $1,466 for each year increase in education.
does not have a meaningful interpretation.
means that the average account balance decreases by $1,466 for each year increase in age.
means that the average account balance increases by $1,466 for each year increase in age.
 
The number
0.116
 
does not have a meaningful interpretation.
means that the average account balance increases by $0.116 for each $1 increase in household wealth.
means that the average account balance decreases by $0.116 for each $1 increase in household wealth.
means that the average account balance decreases by 0.116% for each $1 increase in household wealth.
means that the average account balance increases by 0.116% for each $1 increase in household wealth.
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