Linear modeling in R using categorical variables - parallel slopes models

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Need to include a categorical variable in your linear model in R? Start here.
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  1. Equitable Equations
  2. regression in R
  3. regression with categorical variable
  4. regression with factor in R
  5. parallel slope model in R
  6. additive model in R
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Комментарии
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Thank you so much for the crystal clear explanation kind sir

jayskieeee
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Great video. I from Brazil and I have a question: I read in a book about some tests comparing regression models with qualitative variables through parallelism tests, regression equivalence tests, and identity tests. What I want to know is if it's possible to unite groups, for example group A == B, A != C, by creating a model y ~ 1 + x + dummy, where dummy is (AB and C).

marcosdanieldasilva
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Hi, your videos have been helpful. Can you please share your notes or where can I find them?

Dilysia
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Hello, what can i do when i have 3 categorical independent variables with 2, 3 and 4 levels?

andreasschmidt