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When you read published research studies, you will find that many are experimental studies in which one or more variables are manipulated. An example is a study of whether students with windows in their classrooms give their instructors higher evaluations than students with no windows in their classrooms. You could compare these two groups with a t-test, which you studied in Week 4. Perhaps it would be more interesting to have additional levels of "scenery." You might compare instructor evaluations when students are in a class with no windows, a class with windows that look out to a parking lot, a class with windows that look out to a park, or a class with no windows but pictures of windows on the wall. Since you have multiple levels of the factor, scenery, you use an ANOVA instead of a t-test.
This assignment will give you practice interpreting a study with multiple levels of a factor. Since many research studies rely on the ANOVA for analysis, you will enhance your ability to understand the results of research studies that are of interest to you.
To prepare for this assignment:
No Interaction
Low Interaction
Moderate Interaction
High Interaction
4
3
5
6
The summary table is as follows:
Source
Sum of Squares
df
Mean Square
F
Between groups
9.75
3.250
5.91
Within groups
8.80
16
0.550
Total
18.55
19
The assignment (1-2 pages):
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