random walk

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random walk

n. Statistics
A sequence of changes, either in the value of a random variable or in a process (as in the price of a share of stock), in which the direction and size of each change is randomly determined, subject to some specified rules.

random walk

n
1. (General Physics) a mathematical model used to describe physical processes, such as diffusion, in which a particle moves in straight-line steps of constant length but random direction
2. (Statistics) statistics a route consisting of successive and connected steps in which each step is chosen by a random mechanism uninfluenced by any previous step

ran′dom walk′


n.
the path of a point or quantity that moves or changes in a stepwise manner, where the direction of each step is statistically random.
[1900–05]
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.random walk - a stochastic process consisting of a sequence of changes each of whose characteristics (as magnitude or direction) is determined by chance
stochastic process - a statistical process involving a number of random variables depending on a variable parameter (which is usually time)
Translations
References in periodicals archive ?
Second part of Table 8 compares the difference in the forecasting performance of the structural models to the benchmark random walk with drift model.
In addition, we test the hypothesis that Yt is a random walk with drift, i.
0]: [gamma] = [beta] = 0, we are testing the possibility of random walk with drift model, that is, if we could not reject the null hypothesis then the series is a random walk with drift, and therefore the trend parameter [beta] is insignificant.