EBK MATLAB: AN INTRODUCTION WITH APPLIC
6th Edition
ISBN: 8220103113663
Author: GILAT
Publisher: YUZU
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Chapter 10, Problem 7P
a 3-D mesh plot of the
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12. A sociologist hypothesizes that the crime rate is higher in areas
with higher poverty rate and lower median income. She col-
lects data on the crime rate (crimes per 100,000 residents),
the poverty rate (in %), and the median income (in $1,000s)
from 41 New England cities. A portion of the regression results
is shown in the following table.
Standard
Coefficients
error
t stat
p-value
Intercept
-301.62
549.71
-0.55 0.5864
Poverty
53.16
14.22
3.74 0.0006
Income
4.95
8.26
0.60 0.5526
a.
b.
Are the signs as expected on the slope coefficients?
Predict the crime rate in an area with a poverty rate of
20% and a median income of $50,000.
3. Using data from 50 work
2. The owner of several used-car dealerships believes that the
selling price of a used car can best be predicted using the car's
age. He uses data on the recent selling price (in $) and age of
20 used sedans to estimate Price = Po + B₁Age + ε. A portion
of the regression results is shown in the accompanying table.
Standard
Coefficients
Intercept
21187.94
Error
733.42
t Stat p-value
28.89 1.56E-16
Age
-1208.25
128.95 -9.37
2.41E-08
a. What is the estimate for B₁? Interpret this value.
b. What is the sample regression equation?
C. Predict the selling price of a 5-year-old sedan.
ian income of $50,000.
erty rate of
13. Using data from 50 workers, a researcher estimates Wage =
Bo+B,Education + B₂Experience + B3Age+e, where Wage
is the hourly wage rate and Education, Experience, and Age
are the years of higher education, the years of experience, and
the age of the worker, respectively. A portion of the regression
results is shown in the following table. ni ogolloo bash
1
Standard
Coefficients error
t stat p-value
Intercept
7.87
4.09
1.93
0.0603
Education
1.44
0.34
4.24 0.0001
Experience
0.45
0.14
3.16
0.0028
Age
-0.01
0.08 -0.14 0.8920
a. Interpret the estimated coefficients for Education and
Experience.
b. Predict the hourly wage rate for a 30-year-old worker
with four years of higher education and three years of
experience.
Chapter 10 Solutions
EBK MATLAB: AN INTRODUCTION WITH APPLIC
Ch. 10 - Prob. 1PCh. 10 - A staircase of height h is modeled by the...Ch. 10 - The ladder of a fire truck can be elevated...Ch. 10 - Prob. 4PCh. 10 - Prob. 5PCh. 10 - Prob. 6PCh. 10 - a 3-D mesh plot of the function z=cos2Re0.2R where...Ch. 10 - Prob. 8PCh. 10 - Prob. 9PCh. 10 - A monochromatic light that passes through a slit...
Ch. 10 - Molecules of a gas in a container are moving...Ch. 10 - Plank’s distribution law gives the black-body...Ch. 10 - Consider steady-state vibration of a friction-free...Ch. 10 - An RLC circuit with an alternating voltage source...Ch. 10 - In the solution of elasticity problem of a normal...Ch. 10 - A high-pass tiller passes signals with frequencies...Ch. 10 - The equation for the streamlines for uniform flow...Ch. 10 - 18. The deflection w of a clamped circular...Ch. 10 - The Verhulst model, given in the following...Ch. 10 - The geometry of a ship hull (Wigleyhull) can be...Ch. 10 - The stress fields near a crack tip of a linear...Ch. 10 - 22. A ball thrown up falls back to the floor and...
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