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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