The Essentials of Statistics: A Tool for Social Research
4th Edition
ISBN: 9781305802698
Author: Joseph F. Healey
Publisher: Cengage Learning US
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Chapter 1, Problem 1.4P
For each of the following items from a public-opinion survey, indicate the level of measurement.
a. In what country were you born? __________
b. What is your age? __________
c. How many years of school have you completed?
__________
d. What is your occupation? __________
e. If you were asked to use one of these four names for your social class, in which would you say you belonged?
__________Upper __________ Middle
__________Working __________ Lower
f. What is your grade-point average? __________
g. What is your major? __________
h. The only way to deal with the drug problem is to legalize all drugs.
__________ Strongly agree
__________ Agree
__________ Undecided
__________ Disagree
__________ Strongly disagree
i. What is your astrological sign? __________
j. How many brothers and sisters do you have?
__________
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A 24-1 design has been used to investigate the effect of four factors on the resistivity of a silicon wafer. The data
from this experiment are shown in Table 4.
Table 4: Resistivity Experiment for Exercise 5
Run
A
B
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Resistivity
1
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2
3
4
5
6
7
8
9
10
11
12
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0
0
||++TI++o000
33.2
4.6
31.2
9.6
40.6
162.4
39.4
158.6
63.4
62.6
58.7
0
0
60.9
3
(a) Estimate the factor effects. Plot the effect estimates on a normal probability scale.
(b) Identify a tentative model for this process. Fit the model and test for curvature.
(c) Plot the residuals from the model in part (b) versus the predicted resistivity. Is there any indication on
this plot of model inadequacy?
(d) Construct a normal probability plot of the residuals. Is there any reason to doubt the validity of the
normality assumption?
Stem1: 1,4
Stem 2: 2,4,8
Stem3: 2,4
Stem4: 0,1,6,8
Stem5: 0,1,2,3,9
Stem 6: 2,2
What’s the Min,Q1, Med,Q3,Max?
Are the t-statistics here greater than 1.96? What do you conclude?
colgPA= 1.39+0.412 hsGPA
(.33) (0.094)
Find the P value
Chapter 1 Solutions
The Essentials of Statistics: A Tool for Social Research
Ch. 1 - In your own words, describe, the role of...Ch. 1 - Find a research article in any social science...Ch. 1 - Distinguish between descriptive and inferential...Ch. 1 - For each of the following items from a...Ch. 1 - Following are brief descriptions of how...Ch. 1 - For each research project listed here, identify...Ch. 1 - For each of the following research situations,...Ch. 1 - Identify all variables in the research situations...
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