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Random Testing: Drug and alcohol tests administered by an employer that selects employees to be tested on a random basis.

Random Spatial Distribution: Situation in which individuals are randomly distributed in a space; probability of an individual's being located at any given point is the same irrespective of location in the space

Random Variable: A function that assigns a real number to each and every possible outcome of a random experiment.

Random Walk: Theory that stock price changes from day to day are accidental or haphazard; changes are independent of each other and have the same probability distribution. Many believers in the random wa . . . View Full Definition

Random Play: Also known as shuffle play. In CD players and changers, this function randomizes the order of selections during playback. Some CD players offer a 'Random Play with Delete' feature that preve . . . View Full Definition

Random Error: Random errors are errors that affect the precision of a set of measurements. Random error scatters measurements above and below the mean, with small random errors being more likely than large ones.

Preadmission Testing: Medical tests that are completed for an individual prior to being admitted to a hospital or inpatient health care facility.

Prenatal Testing: Testing to detect the presence of a genetic disorder in an embryo or fetus; commonly done by amniocentesis or chorionic villi sampling.

Random Access Memory (RAM): All memory accessible at any instant by a processor. Called random because of the random placement of information within the memory bank. Operates at very high speeds on a high speed bus, to the CPU.

Random Code Encryption: In auto security systems, these terms describe anti-code grabbing technology, a feature which prevents malicious persons who use a special receiver to intercept remote control codes, from us . . . View Full Definition