Y = β0 + β1 X + β2 X2 + β3 Z + β4 X Z + β5 X2 Z + ε

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47. Interaction between variables

A linear model with one X-variable and one group variable (Z)

Y

X

The data column consists of two groups,
possibly from different models

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A

B

Data consists of two groups (A) and
(B) generated by the models:

β0

β1

β2

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