Part 1:
Note:For a two-way ANOVA, you will be expected to create a line graph as covered in the SPSS tutorial in the Course Content (and not a boxplot as in the textbook). This applies to future cumulative questions as well.
Green & Salkind: Lesson 26 - Exercises 1, 4-8
The following helpful tips are numbered to correspond with the exercise number to which they refer (dashes indicate no tips are needed):
1. Instead of identifying these values on your output, as the text states, please write them into your Word file as written answers for #1 a, b, c, and d.
4. Produce a line graph instead of a boxplot for this problem. Follow directions the in course SPSS tutorial for setting up a line graph.
5. -------
6. -------
7. Write a current APA-style Results section based on your analyses. All homework Results sectionsmust 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.
8. Produce a line graph instead of a boxplot for this problem and for two-way ANOVAs in general in the course. Follow directions in the course SPSS tutorial for setting up a line graph.
Part 2:
1. In response to media reports of violence on college campuses, a psychologist who works at a local community college decides to study students' perceptions of campus safety. He hopes to use these results to help develop an on-campus violence prevention program. The administration has asked him additionally to look at whether perceptions of safety differ depending on students' year in school and gender. The psychologist administers a questionnaire with possible scores ranging from 1 to 70, with higher scores indicating higher perceptions of safety on campus, and lower scores indicating perceptions that the campus is less safe. Run a two-way ANOVA to determine whether year in school and/or gender have an effect on perceptions of campus safety.
|
Male
|
Freshmen
|
Sophomore
|
Junior
|
Senior
|
|
39
66
54
66
60
|
44
32
62
59
29
|
63
67
46
51
41
|
45
53
68
57
60
|
|
Female
|
51
46
45
57
32
|
32
21
30
49
53
|
56
52
60
47
59
|
61
55
42
58
61
|
a) Paste the SPSS output
b) Write a current APA-style Results section based on your analyses. All homework Results sectionsmust 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.For the two-way ANOVA, be sure to include statistical statements concerning the F ratios and p values for both main effects and the interaction, and interpretation statements about all 3 of these effects.
c) Based on group means, which class has the lowest perceptions of campus safety, regardless of gender?
d) Is there a significant interaction effect?
Part 3: Cumulative Homework
1. As part of a new prevention program, a clinical psychologist wants to see whether feelings of alienation differ as a function of immigration status in a local high school. She divides volunteer students into 3 categories: first-generation immigrants, second-generation immigrants, and non-immigrants. She then administers an instrument assessing feelings of alienation, where higher scores indicate stronger feelings of alienation from peers, adults, and society in general. Is there a difference in alienation scores among these 3 groups?
|
First-generation
immigrants
|
Second-generation
immigrants
|
Non-immigrants
|
|
35
39
34
37
36
23
39
|
26
37
28
29
36
25
18
|
29
22
17
25
19
30
16
|
a) Paste the appropriate SPSS output.
b) Paste the appropriate SPSS graph.
c) Write a current APA-style Results section based on your analyses. All homework Results sectionsmust 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.