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PSYC 355 SPSS HOMEWORK 6 PREDICTION: BIVARIATE LINEAR REGRESSION | Complete Solution

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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. You will use raw data for all homework exercises with no need to convert to z scores.

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.    Use raw scores, not z scores, in the regression analysis. (3 pts for output and 2 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 SPSS tutorial presentations and 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), as well as a decision about the null hypothesis. (3 pts)

Part 2:

1.    A community psychologist is interested in whether people’s self-reported degree of religious belief predicts their self-reported feelings of well-being. She administers two questionnaires to 17 individuals, one of which measures degree of religious beliefs (scores range from 1–20 with higher scores indicating higher degree of belief), and another which measures feelings of well-being (scores range from 1–25 with higher scores indicating stronger feelings of well-being). 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.

Table is shown on the following page.

Degree of Religious Belief    Self-Reported Well-Being
14    19
12    17
20    18
6    10
20    22
18    24
16    17
8    11
12    17
10    9
4    14
19    24
17    21
5    12
15    19
3    11
6    9

a)    SPSS output (3 pts)
b)    Construct a scatterplot of the relationship between the 2 variables. Plot the regression line on this graph. (3 pts)
c)    Is degree of religious belief predictive of feelings of well-being in this sample? Write a Results section in current APA style describing the outcome. All homework “Results sections” must follow the example given in the SPSS tutorial presentation and 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), as well as a decision about the null hypothesis. (3 pts)

Part 3: Cumulative Homework

1.    To investigate the relationship between a person’s commute time to work and general life stress, a health psychologist interviewed people about the time they spend in their daily commute to work (in minutes) and had them fill out the Perceived Stress Scale (PSS) (http://www.macses.ucsf.edu/research/psychosocial/pss10.php), with scores ranging from 0 (no perceived stress) to 10 (high perceived stress). Is there a significant relationship between time of commute and general life stress? 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.

 

 

Time Spent Commuting to Work (mins.)    PSS® Stress Score
47
19
35
15
20
15
13
19
18
50
65
30
40    6
3
5
2
3
4
3
7
5
9
8
4
6

a)    Paste appropriate SPSS output. (4 pts)
b)    Paste appropriate SPSS graph. (4 pts)
c)    Write a current APA-style Results section based on your analyses. All homework “Results sections” should follow the example given in the SPSS tutorials and the Course Content document “Writing Results of Statistical Tests in Current APA Format” (note: you do not have to refer to a figure). Remember to include a decision about the null hypothesis. (4 pts)

Submit this assignment by 11:59 p.m. (ET) on Monday of Module/Week 6.

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[Solved] PSYC 355 SPSS HOMEWORK 6 PREDICTION: BIVARIATE LINEAR REGRESSION | Complete Solution

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