The Design of Experiments[r]: A monograph (1935) by R.A. Fisher in which he established formal statistical methods for rigorously evaluating the outcomes of controlled experiments. [e]
Psychometrics[r]: Field of study concerned with the theory and technique of educational and psychological measurement, which includes the measurement of knowledge, abilities, attitudes, and personality traits. [e]
Set[r]: Informally, any collection of distinct elements. [e]
Data[r]: "Pieces of information", especially numbers or quantities [e]