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5. Here is the dataset for each group. I suggest download this…
5. Here is the dataset for each group. I suggest download this table to help your calculation. I included a few calculations in the attached table to help you out.
Text Message Video Chat Phone Conversation
9 8 9
8 8 5
7 7 6
5 9 4
3 5 5
4 7 3
9 5 8
8 6 6
9 7 4
8 9 3
7 8 2
9 7 4
5 5 8
5 9 6
8 4 2
Text Message Text2 Video Video2 Phone Phone2
9 81 8 64 9 81
8 64 8 64 5 25
7 49 7 49 6 36
5 25 9 81 4 16
3 9 5 25 5 25
4 16 7 49 3 9
9 81 5 25 8 64
8 64 6 36 6 36
9 81 7 49 4 16
8 64 9 81 3 9
7 49 8 64 2 4
9 81 7 49 4 16
5 25 5 25 8 64
5 25 9 81 6 36
8 64 4 16 2 4
Mean 6.93 6.93 5
SD 2.02
1.62
2.17 N 45
SSX
SX 104 104 75 (SSX)2/N
X SS(X2)
S(X2) S(SX)2/n
(SX)2
(SX)2 / n
6. There are lots of steps we need to take before we can calculate the final test statistic. Let’s break it down into steps. What is the Sum of Squares (SS) between? See the powerpoint for the formula for this one! Please round your answer to two decimal places.
7. Okay, now let’s figure out what’s the Sum of Squares (SS) within?
8. Okay, what’s the Mean Squares Within (MSwithin)? See the powerpoint for this formula. Remember, calculate the DF to figure this one out!
9. What’s the Mean Squares Between (MSBetween)?
10. Now we’re ready to calculate the test statistic (yay!). What is the F statistic value? Round your answer to two decimal places.
11. What is the df between (also known as the df Numerator)?
Group of answer choices
df = 30
df = 3
df = 27
df = 2
12. What is the df within (also known as the df Demominator)?
13. What is the critical value? (Remember, if you cannot find the exact DF denominator value in the table, you should look for the closest number that is there).
14. Based on the critical value and the obtained value, do you accept or reject the null hypothesis?
Group of answer choices
Reject the null hypothesis
Fail to reject the null hypothesis
15. Based on your answer to the previous question, should we run a post hoc test (don’t worry, I won’t make you calculate them, I just want to know if we should do a post hoc test in this situation).
Group of answer choices
No
Yes
16. Write up results as you would see them in a research paper. Be sure that you include the means and standard deviations for each group in your write-up, as well as a sentence or two explaining the results! See the powerpoint for help with this. do not need to calculate or include the post-hoc test here.
17. Although we won’t cover post hoc tests in this course, we will in Methods II. I want to prepare you for them a bit right now. Below is a table that shows computer output for a Tukey Post-Hoc test for the ANOVA you just calculated for your Individual Assignment 13 (comparing the text message group, the phone conversation group, and the video chat group on their ratings of closeness to their friends). If you have trouble viewing the image below, you can. This link contains the accessible file for the table below.
Multiple Comparisons
Dependent Variable: Closeness
Tukey HSD
(I) Group
(J) Group
Mean Difference (I-J)
Std. Error
Sig (p).
Text Message1
Video Chat2
0.00
.97958
.0000
Phone3
1.93*
.97958
.025
Video Chat2
Text Message1
0.00
.97958
.0000
Phone3
1.93*
.97958
.0000
Phone3
Text Message1
1.93*
.97958
.025
Video Chat2
1.93*
.97958
.025
18. Based on the Tukey Post-Hoc table (above), is there a significant difference between the text and video groups? You may have to spend some time looking at the table and trying to interpret what each column means.
Group of answer choices
No
Yes
19. Based on the Tukey Post-Hoc table (above), is there a significant difference between the text and phone groups? You may have to spend some time looking at the table and trying to interpret what each column means.
Group of answer choices
Yes
No
20. Based on the Tukey Post-Hoc table (above), is there a significant difference between the video and phone groups? You may have to spend some time looking at the table and trying to interpret what each column means.
Group of answer choices
Yes
No
