Topic Six Homework - PSY-380, section LS02/03/20, Spring 2020
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3/3/2020 Topic Six Homework - PSY-380, section LS02/03/20, Spring 2020 | WebAssign
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PSY-380, section LS02/03/20, Spring 2020
Topic Six Homework (Homework)
INSTRUCTOR
Lindsey Scholta
Grand Canyon University, AZ
Current Score
QUESTION
POINTS
TOTAL SCORE
183/183 100.0%
MON, MAR 16, 2020
12:29 PM GMT+5:30
Assignment Submission & Scoring
Assignment Submission
For this assignment, you submit answers by question parts. The number of submissions remaining for each question part only
changes if you submit or change the answer.
Assignment Scoring
Your best submission for each question part is used for your score.
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https://www.webassign.net/web/Student/Assignment-Responses/submit?dep=23286310&tags=autosave#question3961615_26 1/25
jjjtong23@gmail.com (
sign out)
PSY-380, section LS02/03/20, Spring 2020
Topic Six Homework (Homework)
INSTRUCTOR
Lindsey Scholta
Grand Canyon University, AZ
Current Score
QUESTION
POINTS
TOTAL SCORE
183/183 100.0%
MON, MAR 16, 2020
12:29 PM GMT+5:30
Assignment Submission & Scoring
Assignment Submission
For this assignment, you submit answers by question parts. The number of submissions remaining for each question part only
changes if you submit or change the answer.
Assignment Scoring
Your best submission for each question part is used for your score.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17
Home My Assignments Grades
Communication CalendarMy eBooks
1/1 1/1 3/3 8/8 3/3 8/8 11/11 10/10 5/5 3/3 1/1 1/1 4/4 3/3 2/2 13/13 11/1
Due Date
3/3/2020 Topic Six Homework - PSY-380, section LS02/03/20, Spring 2020 | WebAssign
https://www.webassign.net/web/Student/Assignment-Responses/submit?dep=23286310&tags=autosave#question3961615_26 2/25
A researcher conducts a one-way ANOVA in which one independent variable has three levels. How many different groups are in this
study?
3 groups
Additional Materials
eBook
Are post hoc tests necessary following a significant ANOVA testing one independent variable with two levels Explain.
Additional Materials
eBook
State the degrees of freedom error in each of the following tests.
(a) A consultant measures job satisfaction in a sample of 13 supervisors, 13 managers, and 13 executives at a local firm.
36
(b) A researcher tests how nervous public speakers get in front of a small, medium, or large audience. Twelve participants are
randomly assigned to each group.
33
(c) A high school counselor has 10 students in each of five classes rate how much they like their teacher.
45
Additional Materials
eBook
(k = 2)?
Yes. When a variable has only two levels, then those two levels must be checked to determine if they are significantly different
following a significant ANOVA. A post hoc test is necessary.
No. When a variable has only two levels, then those two levels must be significantly different following a significant ANOVA.
There are no multiple comparisons to make, so a post hoc test is not necessary.
1. PRIVITERASTATS3 12.E.003.1/1 points Previous Answers My Notes
2. PRIVITERASTATS3 12.E.009.1/1 points Previous Answers My Notes
3. PRIVITERASTATS3 12.E.013.3/3 points Previous Answers My Notes
https://www.webassign.net/web/Student/Assignment-Responses/submit?dep=23286310&tags=autosave#question3961615_26 2/25
A researcher conducts a one-way ANOVA in which one independent variable has three levels. How many different groups are in this
study?
3 groups
Additional Materials
eBook
Are post hoc tests necessary following a significant ANOVA testing one independent variable with two levels Explain.
Additional Materials
eBook
State the degrees of freedom error in each of the following tests.
(a) A consultant measures job satisfaction in a sample of 13 supervisors, 13 managers, and 13 executives at a local firm.
36
(b) A researcher tests how nervous public speakers get in front of a small, medium, or large audience. Twelve participants are
randomly assigned to each group.
33
(c) A high school counselor has 10 students in each of five classes rate how much they like their teacher.
45
Additional Materials
eBook
(k = 2)?
Yes. When a variable has only two levels, then those two levels must be checked to determine if they are significantly different
following a significant ANOVA. A post hoc test is necessary.
No. When a variable has only two levels, then those two levels must be significantly different following a significant ANOVA.
There are no multiple comparisons to make, so a post hoc test is not necessary.
1. PRIVITERASTATS3 12.E.003.1/1 points Previous Answers My Notes
2. PRIVITERASTATS3 12.E.009.1/1 points Previous Answers My Notes
3. PRIVITERASTATS3 12.E.013.3/3 points Previous Answers My Notes
3/3/2020 Topic Six Homework - PSY-380, section LS02/03/20, Spring 2020 | WebAssign
https://www.webassign.net/web/Student/Assignment-Responses/submit?dep=23286310&tags=autosave#question3961615_26 3/25
What is the decision at a 0.05 level of significance for each of the following tests? Hint: Find the critical value for each test; then
make a decision. (Round your critical values to two decimal places.)
Part (a)
Part (b)
Part (c)
Part (d)
You may need to use the appropriate table in Appendix C to answer this question.
Additional Materials
eBook
F(3, 25) = 3.07
Fcrit = 2.99
Retain the null hypothesis.
Reject the null hypothesis.
F(5, 20) = 2.52
Fcrit = 2.71
Retain the null hypothesis.
Reject the null hypothesis.
F(4, 37) = 2.68
Fcrit = 2.63
Retain the null hypothesis.
Reject the null hypothesis.
F(2, 13) = 3.73
Fcrit = 3.80
Retain the null hypothesis.
Reject the null hypothesis.
4. PRIVITERASTATS3 12.E.015.8/8 points Previous Answers My Notes
https://www.webassign.net/web/Student/Assignment-Responses/submit?dep=23286310&tags=autosave#question3961615_26 3/25
What is the decision at a 0.05 level of significance for each of the following tests? Hint: Find the critical value for each test; then
make a decision. (Round your critical values to two decimal places.)
Part (a)
Part (b)
Part (c)
Part (d)
You may need to use the appropriate table in Appendix C to answer this question.
Additional Materials
eBook
F(3, 25) = 3.07
Fcrit = 2.99
Retain the null hypothesis.
Reject the null hypothesis.
F(5, 20) = 2.52
Fcrit = 2.71
Retain the null hypothesis.
Reject the null hypothesis.
F(4, 37) = 2.68
Fcrit = 2.63
Retain the null hypothesis.
Reject the null hypothesis.
F(2, 13) = 3.73
Fcrit = 3.80
Retain the null hypothesis.
Reject the null hypothesis.
4. PRIVITERASTATS3 12.E.015.8/8 points Previous Answers My Notes
3/3/2020 Topic Six Homework - PSY-380, section LS02/03/20, Spring 2020 | WebAssign
https://www.webassign.net/web/Student/Assignment-Responses/submit?dep=23286310&tags=autosave#question3961615_26 4/25
A researcher measures job satisfaction among married, single, and divorced employees to determine whether marital status can
influence job satisfaction. Based on the following description in APA format, state the value for k, N, and n.
A one-way analysis of variance showed that job satisfaction did not vary by marital status,
k = 3
N = 30
n = 10
Additional Materials
eBook
The following is an incomplete F-table summarizing the results of a study of the variance of life satisfaction scores among unemployed,
retired, part-time, and full-time employees.
Source of Variation SS df MS F
Between groups 16
Within groups (error) 36
Total 136
(a) Complete the F-table. (Round your values for mean squares and F to two decimal places.)
Source of Variation SS df MS F
Between groups 48 3 16 6.56
Within groups (error) 88 36 2.44
Total 136 39
(b) Compute omega-squared (Round your answer to two decimal places.)
ω2 = 0.29
(c) Is the decision to retain or reject the null hypothesis? (Assume alpha equal to 0.05.)
You may need to use the appropriate table in Appendix C to answer this question.
Additional Materials
eBook
F(2, 27) = 1.38, p > 0.05.
(ω2).
Retain the null hypothesis.
Reject the null hypothesis.
5. PRIVITERASTATS3 12.E.019.3/3 points Previous Answers My Notes
6. PRIVITERASTATS3 12.E.023.8/8 points Previous Answers My Notes
https://www.webassign.net/web/Student/Assignment-Responses/submit?dep=23286310&tags=autosave#question3961615_26 4/25
A researcher measures job satisfaction among married, single, and divorced employees to determine whether marital status can
influence job satisfaction. Based on the following description in APA format, state the value for k, N, and n.
A one-way analysis of variance showed that job satisfaction did not vary by marital status,
k = 3
N = 30
n = 10
Additional Materials
eBook
The following is an incomplete F-table summarizing the results of a study of the variance of life satisfaction scores among unemployed,
retired, part-time, and full-time employees.
Source of Variation SS df MS F
Between groups 16
Within groups (error) 36
Total 136
(a) Complete the F-table. (Round your values for mean squares and F to two decimal places.)
Source of Variation SS df MS F
Between groups 48 3 16 6.56
Within groups (error) 88 36 2.44
Total 136 39
(b) Compute omega-squared (Round your answer to two decimal places.)
ω2 = 0.29
(c) Is the decision to retain or reject the null hypothesis? (Assume alpha equal to 0.05.)
You may need to use the appropriate table in Appendix C to answer this question.
Additional Materials
eBook
F(2, 27) = 1.38, p > 0.05.
(ω2).
Retain the null hypothesis.
Reject the null hypothesis.
5. PRIVITERASTATS3 12.E.019.3/3 points Previous Answers My Notes
6. PRIVITERASTATS3 12.E.023.8/8 points Previous Answers My Notes
3/3/2020 Topic Six Homework - PSY-380, section LS02/03/20, Spring 2020 | WebAssign
https://www.webassign.net/web/Student/Assignment-Responses/submit?dep=23286310&tags=autosave#question3961615_26 5/25
Iconic memory is a type of memory that holds visual information for about half a second (0.5 seconds). To demonstrate this type of
memory, participants were shown three rows of four letters for 50 milliseconds. They were then asked to recall as many letters as
possible, with a 0-, 0.5-, or 1.0-second delay before responding. Researchers hypothesized that longer delays would result in poorer
recall. The number of letters correctly recalled is given in the table.
Delay Before Recall
0 0.5 1
5 10 4
7 6 4
10 3 6
11 8 2
9 5 3
6 4 5
(a) Complete the F-table. (Round your values for MS and F to two decimal places.)
Source of Variation SS df MS F
Between groups 48 2 24 5
Within groups (error) 72 15 4.8
Total 120 17
(b) Compute Tukey's HSD post hoc test and interpret the results. (Assume alpha equal to 0.05. Round your answer to two
decimal places.)
The critical value is 3.29 for each pairwise comparison.
Which of the comparisons had significant differences? (Select all that apply.)
You may need to use the appropriate table in Appendix C to answer this question.
Additional Materials
eBook
Recall following no delay was significantly different from recall following a one second delay.
Recall following no delay was significantly different from recall following a half second delay.
Recall following a half second delay was significantly different from recall following a one second delay.
The null hypothesis of no difference should be retained because none of the pairwise comparisons demonstrate a
significant difference.
7. PRIVITERASTATS3 12.E.025.11/11 points Previous Answers My Notes
https://www.webassign.net/web/Student/Assignment-Responses/submit?dep=23286310&tags=autosave#question3961615_26 5/25
Iconic memory is a type of memory that holds visual information for about half a second (0.5 seconds). To demonstrate this type of
memory, participants were shown three rows of four letters for 50 milliseconds. They were then asked to recall as many letters as
possible, with a 0-, 0.5-, or 1.0-second delay before responding. Researchers hypothesized that longer delays would result in poorer
recall. The number of letters correctly recalled is given in the table.
Delay Before Recall
0 0.5 1
5 10 4
7 6 4
10 3 6
11 8 2
9 5 3
6 4 5
(a) Complete the F-table. (Round your values for MS and F to two decimal places.)
Source of Variation SS df MS F
Between groups 48 2 24 5
Within groups (error) 72 15 4.8
Total 120 17
(b) Compute Tukey's HSD post hoc test and interpret the results. (Assume alpha equal to 0.05. Round your answer to two
decimal places.)
The critical value is 3.29 for each pairwise comparison.
Which of the comparisons had significant differences? (Select all that apply.)
You may need to use the appropriate table in Appendix C to answer this question.
Additional Materials
eBook
Recall following no delay was significantly different from recall following a one second delay.
Recall following no delay was significantly different from recall following a half second delay.
Recall following a half second delay was significantly different from recall following a one second delay.
The null hypothesis of no difference should be retained because none of the pairwise comparisons demonstrate a
significant difference.
7. PRIVITERASTATS3 12.E.025.11/11 points Previous Answers My Notes
3/3/2020 Topic Six Homework - PSY-380, section LS02/03/20, Spring 2020 | WebAssign
https://www.webassign.net/web/Student/Assignment-Responses/submit?dep=23286310&tags=autosave#question3961615_26 6/25
An educator wants to evaluate four different methods aimed at reducing the time children spend "off task" in the classroom. To test
these methods, she implements one method in each of four similar classrooms and records the time spent off task (in minutes) in each
classroom. The results are given in the table.
Classroom Method
A B C D
3 1 0 2
1 4 6 3
5 2 3 2
2 5 3 4
1 0 0 3
0 1 5 2
2 3 4 5
4 4 5 4
4 0 4 4
(a) Complete the F-table. (Round your answers to two decimal places.)
Source of
Variation SS df MS F
Between
groups 8.31 3 2.77 0.93
Within
groups (error) 95.33 32 2.98
Total 103.64 35
(b) Is it necessary to compute a post hoc test? Explain. (Assume alpha equal to 0.05.)
You may need to use the appropriate table in Appendix C to answer this question.
Additional Materials
eBook
Yes, post hoc analyses are appropriate because the ANOVA is significant.
No, post hoc analyses are not appropriate because the ANOVA is not significant.
8. PRIVITERASTATS3 12.E.027.10/10 points Previous Answers My Notes
https://www.webassign.net/web/Student/Assignment-Responses/submit?dep=23286310&tags=autosave#question3961615_26 6/25
An educator wants to evaluate four different methods aimed at reducing the time children spend "off task" in the classroom. To test
these methods, she implements one method in each of four similar classrooms and records the time spent off task (in minutes) in each
classroom. The results are given in the table.
Classroom Method
A B C D
3 1 0 2
1 4 6 3
5 2 3 2
2 5 3 4
1 0 0 3
0 1 5 2
2 3 4 5
4 4 5 4
4 0 4 4
(a) Complete the F-table. (Round your answers to two decimal places.)
Source of
Variation SS df MS F
Between
groups 8.31 3 2.77 0.93
Within
groups (error) 95.33 32 2.98
Total 103.64 35
(b) Is it necessary to compute a post hoc test? Explain. (Assume alpha equal to 0.05.)
You may need to use the appropriate table in Appendix C to answer this question.
Additional Materials
eBook
Yes, post hoc analyses are appropriate because the ANOVA is significant.
No, post hoc analyses are not appropriate because the ANOVA is not significant.
8. PRIVITERASTATS3 12.E.027.10/10 points Previous Answers My Notes
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