Hello,
The attached image (source:
) is clearly an example of confounding, in regards to the effect of x on y, considering the third variable, z (qualitative variable).
Here's my proposed statement: although there is confounding present, there is not interaction; the linear effect of x on y does not depend on the level of z.
Is my statement correct? I'm thinking it depends on how you formally define interaction, and my definition may not be formal enough.
Thanks,
Ben
The attached image (source:
Here's my proposed statement: although there is confounding present, there is not interaction; the linear effect of x on y does not depend on the level of z.
Is my statement correct? I'm thinking it depends on how you formally define interaction, and my definition may not be formal enough.
Thanks,
Ben
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