randomizavimas
Randomizavimas, or randomization, is a methodological principle in experimental design and statistics. It means assigning experimental units, such as participants or plots, to different groups solely by chance. The aim is to reduce selection bias and balance known and unknown confounding factors, thereby improving the reliability of causal conclusions.
In practice, randomizavimas is used in clinical trials, laboratory experiments, agricultural research, and A/B testing in
Core concepts include allocation concealment, which prevents foreknowledge of assignments, and blinding where feasible to reduce
Benefits include reduced bias, improved group comparability, and stronger causal inferences. Limitations include possible chance imbalances,
Its development and promotion are associated with the design of experiments by early 20th-century statisticians, notably