En mathématiques combinatoires, un plan en blocs est un ensemble, muni d'une famille de sous-ensembles dont les membres satisfont un ensemble de propriétés considérées dans une application particulière. Wikipédia
What do you mean by block design?
In combinatorial mathematics, a block design is an incidence structure consisting of a set together with a family of subsets known as blocks, chosen such that frequency of the elements satisfies certain conditions making the collection of blocks exhibit symmetry (balance).
What is a block design example?
In complete block design, every treatment is allocated to every block. In other words, every combination of treatments and conditions (blocks) is tested. For example, an agricultural experiment is aimed at finding the effect of 3 fertilizers (A,B,C) for 5 types of soil (1... 5).
What is a blocked study design?
a type of research study in which participants are divided into relatively homogeneous subsets (blocks) from which they are assigned to the experimental or treatment conditions.
What is a block design in statistics example?
Definition of a Block. A group of experimental units or subjects that are. similar in ways that are expected to affect the response to treatments. In a block design, the random assignment of units to. treatments is carried out separately within each block.