

Check that your experimental setup comforms to a You have a RCBD experimental design if groups of your experimental units differ, and each group has as many experimental units as there are treatments. There is at least one variable that you are aware of that makes the groups differ. There is variation to block on, and the groups are blocks. You have a single factor treatment design (or no treatment design), if you consider your treatments to not be divisible into factors. The treatments are all "just treatments". Plant example: You are applying treatments to plots (experimental units), and all plots are not similar in moisture, soil type, slope, fertility, etc. However, subgroups of plots (four in iluustration above) are similar, and each subgroup is a block. This makes it an RCBD. The number of plots in the block has to equal the number of treatments, so blocks are "complete". You have 5 levels of nitrogen fertilizer. Each block will need to have 5 experimental units. Animal example: You are applying treatments to animals (experimental units), and all animals are not similar in weight, age, breed, etc. However, you can identify subgroups of animals that are similar, and each subgroup is a block. If blocks contain all treatments, this makes it an RCBD. You have 4 protein level diets. Each block will need to have 4 animals.


Home  Contact us  Module list & summary  Glossary/Terms  About this site  Stats courses  Links  Index 