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technicalHaving a random probability distribution or pattern that may be analysed statistically but may not be predicted precisely.

*‘Let us now sum up his mathematical contributions which were almost all in the area of mathematical statistics, more precisely stochastic analysis, random processes, regenerative phenomena and mathematical genetics.’**‘It was heavy duty mathematics at that, involving an obscure technique known as stochastic differential equations.’**‘He has written on stochastic geometry and its applications, and the statistical theory of shape.’**‘Here, we provide a more detailed set of examples, examining the impact of nonlinear population dynamics and stochastic variation in demographic parameters on elasticity analysis.’**‘The fact that the problem is stochastic means that the airline needs to work with expected values and probability distributions, which makes the optimisation harder to solve.’*

**unsystematic**, arbitrary, unmethodical, haphazard, unarranged, unplanned, undirected, casual, indiscriminate, non-specific, stray, erratic

**Origin**

Mid 17th century from Greek stokhastikos, from stokhazesthai ‘aim at, guess’, from stokhos ‘aim’.

**Pronunciation**

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