Treatment coding sets one reference level in a regression factor to zero and represents each other level by an indicator column. With two interacting factors, a main-effect coefficient compares levels at the other factor's reference level; an interaction coefficient is a difference of these contrasts. A joint nested-model F-test can be significant even when some individual coefficient tests are not.

Ancestors (8)

  1. R linear-model formula
  2. Normal linear model
  3. Statistical modelling
  4. Statistical model
  5. Probability and statistics
  6. Area of mathematics
  7. Mathematics
  8. Home

Incoming links (2)

View article source

Discussion (0)

New discussion

There are no discussions about this article yet.

Articles by others on the same topic (0)

There are currently no matching articles.
See all articles in the same topic Create my own version