Dear list, I came upon a question of a linear block design for reviewing an article. It is less of an R-question, but I basically would not know where else to ask. The experimental design looked as follows: Material of different compostion (9 different combinations) was incubated in a laboratory under 3x3 different conditions (each 3 different water and temperature levels). According to the authors, this would lead to 9 treatments (v), 9 blocks (b), a block size of 3 (k) and # of treatments appearing in the design as 3 (r) for their cyclic incomplete block design. Then they assume, 27 experimental vessels would have been enough to answer their question.Failing to apply ordinary multivariate linear models they used MARS models for predicting some measured time series data. My question would be, is this a) a valid/ experimental (block) design and b) based on that, a valid statistical regression approach? Thanks in advance. Christian
Cyclic Block Design
2 messages · Christian Brandstätter, Ben Bolker
Brandst?tter Christian <bran.chri at ...> writes:
Dear list, I came upon a question of a linear block design for reviewing an article. It is less of an R-question, but I basically would not know where else to ask. The experimental design looked as follows:
[snip ... Gmane doesn't like me to quote a lot ...]
My question would be, is this a) a valid/ experimental (block) design and b) based on that, a valid statistical regression approach?
This is definitely not an appropriate question for this list; I'd recommend CrossValidated <http://stats.stackexchange.com> ... Ben Bolker