SPSS Homework 6 Instructions
Prediction:
Bivariate Linear Regression
Part 1:
Note: The z-scoring
method used in the practice data file is covered in Lesson 19
during PSYC 354.
Green & Salkind:
Lesson 33, Exercises 1, 3–4
The following helpful tips are numbered to correspond with
the exercise number to which they refer (a dash indicates
that no tips are
needed):
1.
Though the example in the lesson includes creating a z score
variable, this step is not necessary for the homework
exercises. (3 pts for
output and 3 pts each for a–e)
3.
Write the answer to the last part of this question
beneath your graph, in sentence form. (3 pts)
4.
All homework “Results sections” must follow the example
given in the Course Content document “Writing Results of
Statistical Tests in Current
APA Format” (Note: you do not have to refer to a figure).
Note: The statistical
statement for a bivariate linear regression must include at
least the equation
of the line and the confidence interval for the slope (the
second row under
Confidence Intervals in the output).(3 pts)
Part 2:
1. A
community psychologist is interested in whether spending time
in after-school
programs is predictive of the number of arrests as a young
adult in a high-risk
neighborhood. After collecting records on 17 individuals over
8 years, the
psychologist compiles the information listed in the table
below. Conduct a linear regression to analyze the
research question.
The steps will be the same as the
ones you have been practicing in Part 1 of the assignment—the
only difference
is that you are now responsible for creating the data file as
well. Remember to
name and define your variables under the “Variable View,”
then return to the
“Data View” to enter the data. (3 pts)
Table is shown
on the following page.
Hours Spent in After-School Programs
Number of Arrests After Age 17
3
2
41
1
68
1
29
0
7
5
12
4
121
0
54
1
19
3
134
0
106
1
67
1
25
3
73
1
38
4
110
0
31
3
2. Construct
a scatterplot of the relationship between the 2 variables.
Plot the regression
line on this graph. (3 pts)
3. Is
time spent in after-school programs predictive of the number
of arrests as a
young adult? Write a Results section in current APA style
describing the
outcome. All homework “Results sections” must follow the
example given in the
Course Content document “Writing Results of Statistical Tests
in Current APA
Format” (Note: you do not have to refer to a figure). The
statistical statement for a bivariate linear regression must
include at least the equation of the line and the confidence
interval for the
slope (the second row under Confidence Intervals in the
output). (3 pts)
Part 3: Cumulative
Homework
1. To
investigate the relationship between hours spent studying and
exam scores,
researchers measured the following. Is there a significant
relationship between
hours spent studying and scores? Choose the correct test to
analyze this
question, set up the SPSS file, and run the analysis. Follow
the directions
under the table on the following page.
Hours Spent Studying
Exam Scores
1
3
3
4
4
5
5
5
6
6
7
7
8
40
50
51
61
73
71
64
75
68
76
94
85
84
a)
Paste appropriate SPSS output. (3 pts)
b)
Paste appropriate SPSS graph. (3 pts)
c)
Write a Results section in current APA style describing
the outcome. All homework “Results sections” must follow the
example given in
the Course Content document “Writing Results of Statistical
Tests in Current APA
Format” (Note: you do not have to refer to a figure). (4
pts)
Submit this assignment by 11:59 p.m. (ET) on Monday of
Module/Week 6.
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