Research & Stats Exam III
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Last updated 5:04 PM on 3/21/26
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20 Terms
1
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Marginal Means
The mean scores from all participants at one level of the IV
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SSa
The extent to which the marginal means of A vary
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SSb
The extent to which the marginal means of B vary
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dfa
a-1
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dfb
b-1
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dfaxb
(a-1)(b-1)
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To get dfaxb you
Multiply dfa and dfb
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dfwithin
N-ab
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dftotal
N-1
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SStotal
SSa + SSb + SSaxb + SSwithin
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You have a main effect if
The marginal means are different
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Interaction
One line decreases, the other increases
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DV is always on
The y axis
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The average refers to
The marginal mean
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MSa Formula
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MSb Formula
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MSaxb Formula
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Fa Formula
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Fb Formula
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Faxb Formula
