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In probability and statistics, memorylessness is a property of certain probability distributions.It describes situations where the time already spent waiting for an event does not affect how much longer the wait will be.
The term strong Markov property is similar to the Markov property, except that the meaning of "present" is defined in terms of a random variable known as a stopping time. The term Markov assumption is used to describe a model where the Markov property is assumed to hold, such as a hidden Markov model .
It is the continuous analogue of the geometric distribution, and it has the key property of being memoryless. [2] In addition to being used for the analysis of Poisson point processes it is found in various other contexts. [3] The exponential distribution is not the same as the class of exponential families of distributions.
The geometric distribution is the only memoryless discrete probability distribution. [4] It is the discrete version of the same property found in the exponential distribution. [1]: 228 The property asserts that the number of previously failed trials does not affect the number of future trials needed for a success.
A Markov process is a stochastic process that satisfies the Markov property (sometimes characterized as "memorylessness"). In simpler terms, it is a process for which predictions can be made regarding future outcomes based solely on its present state and—most importantly—such predictions are just as good as the ones that could be made ...
For an exponential survival distribution, the probability of failure is the same in every time interval, no matter the age of the individual or device. This fact leads to the "memoryless" property of the exponential survival distribution: the age of a subject has no effect on the probability of failure in the next time interval.
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The Poisson process is the unique renewal process with the Markov property, [1] as the exponential distribution is the unique continuous random variable with the property of memorylessness. Renewal-reward processes