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random

 [ran´dum]
pertaining to a chance-dependent process.

ran·dom

(ran'dŏm),
1. Governed by chance; used of a process in which the outcome is indeterminate but may assume any of a set of values (the domain) with probabilities specifiable in advance. Although the random process is widely used in probability theory, empiric justification for the term is more complicated. The minimum requirement is that repeated realization of the process will settle down to a stable distribution or, if not metric, a stable set of frequencies if the trait is classifiable only.
2.
[M.E. randon, speed, errancy, fr. O. Fr. randir, to run, fr. Germanic]

random

/ran·dom/ (ran´dom) pertaining to a chance-dependent process, particularly one that occurs according to a known probability distribution.

random

Occurring by chance alone–ie, not by design, pattern, plan, or selection Clinical trials Referring to a formal chance process in which previous events have no bearing on future events. See Random allocation, Randomized trial.

ran·dom

(ran'dŏm)
Governed by chance; denotes a process in which outcome is indeterminate.
[M.E. randon, speed, errancy, fr. O. Fr. randir, to run, fr. Germanic]

random

unplanned, without direction or purpose.

random assignment
random mating
where each member of the population has an equal opportunity of mating with every member of the opposite sex.
random numbers
a list of numbers obtained by a standard randomization procedure; used commonly to select individual animals from a pack.
random sample
see random sample.
random sampling
a procedure for selecting units from a group in such a way that each unit has an equal chance of being selected in the sample.
random selection
selection in such a way as to produce a random sample.
random variable
a group or quantity that takes various values, each with varying probabilities.
References in periodicals archive ?
Rugby Tickets Winner will be randomly selected by midnight on 4th March.
Product may randomly fail to meet specifications for ash analysis and/or mechanical properties when the feed rate from one or more feeders swings higher or lower, resulting in more or less material entering the extruder barrel.
The airline wants to randomly test for drugs in order to achieve zero tolerance on drugs and alcohol to maintain high safety standards.
Police can already, effectively, randomly breath test drivers - although they strongly deny that it happens - and if we can't enforce an 80mg limit, how will a 50mg limit be effective.
Over 500 marathoners were randomly assigned arnica or a placebo cream in a double-blind experiment monitoring their muscle soreness every morning and evening for five days postrace.
To the extent that genes "program" us, we are already "pre-programmed" by our randomly conferred genes; we are just ignorant about which ones are doing what programming.
Shortly before approval, a clinical trial comparing FTC and d4T was stopped early by its Data Safety Monitoring Board (a somewhat unusual occurrence) because the patients in that trial who were randomly assigned to FTC were clearly doing better than those randomly assigned to d4T.
Women with regular menstrual cycles who presented at a clinic requesting emergency contraception within 120 hours of a single act of unprotected coitus were randomly assigned to one of the three regimens--one 10 mg dose of mifepristone, one 1.
The INCOMIN trial studied 188 people with relapsing-remitting MS--92 participants were randomly assigned to take Avonex (interferon beta-1a) once a week; 96 were randomly assigned to take Betaseron (interferon beta-1b) every other day.
Such experiments randomly "treat" individuals and even whole institutions, such as hospitals or schools, with different interventions in order to learn which work better.