measured variable
21Linear regression — Example of simple linear regression, which has one independent variable In statistics, linear regression is an approach to modeling the relationship between a scalar variable y and one or more explanatory variables denoted X. The case of one… …
22Control system — For other uses, see Control system (disambiguation). A control system is a device, or set of devices to manage, command, direct or regulate the behavior of other devices or system. There are two common classes of control systems, with many… …
23Factor analysis — is a statistical method used to describe variability among observed, correlated variables in terms of a potentially lower number of unobserved, uncorrelated variables called factors. In other words, it is possible, for example, that variations in …
24Manipulation checks — Manipulation check is a term in experimental research in the social sciences which refers to certain kinds of secondary evaluations of an experiment. Overview In experiments, an experimenter manipulates some aspect of a process or task and… …
25Feed-forward — is a term describing a kind of system which reacts to changes in its environment, usually to maintain some desired state of the system. A system which exhibits feed forward behavior responds to a measured disturbance in a pre defined way mdash;… …
26Proxy — may refer to something which acts on behalf of something else, as in:* Proxy (statistics), a measured variable used to infer the value of a variable of interest * Proxy (climate), a measured variable used to infer the value of a variable of… …
27Generalized linear model — In statistics, the generalized linear model (GLM) is a flexible generalization of ordinary least squares regression. It relates the random distribution of the measured variable of the experiment (the distribution function ) to the systematic (non …
28Null hypothesis — For the periodical, see Null Hypothesis: The Journal of Unlikely Science. The practice of science involves formulating and testing hypotheses, assertions that are capable of being proven false using a test of observed data. The null hypothesis… …
29Point-biserial correlation coefficient — The point biserial correlation coefficient ( rpb ) is a correlation coefficient used when one variable (e.g. Y ) is dichotomous; Y can either be naturally dichotomous, like gender, or an artificially dichotomized variable. In most situations it… …
30Type I and type II errors — In statistics, the terms Type I error (also, α error, or false positive) and type II error (β error, or a false negative) are used to describe possible errors made in a statistical decision process. In 1928, Jerzy Neyman (1894 1981) and Egon… …
