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The study of how to structure an information-gathering exercise where variation is present.

4 votes
1 answer
613 views

Moving from RCB to CR design, how much bias is introduced?

We designed a RCB experiment and assigned the factor levels to the experimental units randomly inside each block. Let's pretend we changed our mind and we would like to go for a Completely Randomized …
Charlie's user avatar
  • 331
3 votes
0 answers
288 views

Initial conditions of experimental units in Completely Randomized Design

Since I had no answer to the second part of this question I would like to ask it again providing some more infos I gathered in the meantime. Context We are designing a complete randomized trial in a …
Charlie's user avatar
  • 331
16 votes

What is a block in experimental design?

The block is a factor. The main aim of blocking is to reduce the unexplained variation $(SS_{Residual})$ of a design -compared to non-blocked design-. We are not interested in the block effect per se …
Charlie's user avatar
  • 331