What does random number mean
Java / random number
The result of special random experiments is called a random number.
Random numbers are required in various statistical methods, e.g. B. in the selection of a representative sample from a population, in the distribution of test animals to different test groups (randomization), in the Monte Carlo simulation and others.
There are various methods for generating random numbers. These are called random number generators. A decisive criterion for random numbers is whether the result of the generation can be regarded as independent of previous results or not.
Real random numbers are generated with the help of physical phenomena: coin toss, dice, roulette, noise of electronic components, radioactive decay processes or quantum physical effects. These methods are called physical random number generators, but are very time-consuming and technically complex.
In real applications, a sequence of pseudo-random numbers is often sufficient, i.e. seemingly random numbers that are generated according to a fixed, reproducible process. So they are not random because they can be predicted, but they have similar statistical properties (even frequency distribution, low correlation) as true random number sequences. Such procedures are called pseudo random number generators.
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