16 Jun Suppose a researcher measured the test scores of college students
Question
c. Exhibit 12-3
Suppose a researcher measured the test scores of college students who were taught chemistry in the presence of one type of music (country, rock, or classical) in one of three different colored classrooms (red, green, or blue).
Refer to Exhibit 12-3. The design can be described as a
3 x 3
2 x 3
3 x 2
2 x 2
b. Exhibit 12-2
The following information is used for the next 7 items
A researcher performs an experiment and gets the following results
Variable A
Variable B A1 A2
B1 6 8
B2 4 2
Refer to Exhibit 12-2. Is there a main effect of B?
yes
no
can’t tell
It depends on which level of A you consider
a.
b.
When two variables interact
the effect of one variable depends on the level of the other
the main effect cannot be interpreted without discussing the interaction
the effect of one variable does not depend on the level of the other
both a and b
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