Soal Distribusi Poisson

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soal distribusi poisson

The Poisson distribution is a fundamental concept in probability theory and statistics. It describes the probability of a given number of events occurring in a fixed interval of time or space, given a constant mean rate and independence of events. This distribution is particularly useful in modeling rare events, such as the number of accidents at a traffic intersection or the number of phone calls received by a call center in a given period.

Understanding the Poisson Distribution

The Poisson distribution is defined by the parameter λ (lambda), which represents the average number of events in the given interval. The probability mass function of the Poisson distribution is given by P(X = k) = (λ^k e^(-λ)) / k!, where k is the number of events. This formula provides the probability of observing exactly k events.

Applications of the Poisson Distribution

This distribution is widely applied in various fields. In healthcare, it models the number of occurrences of rare diseases. In business, it can predict customer arrivals or system failures. The Poisson distribution is also used in traffic engineering to estimate the number of vehicles passing through a checkpoint.

Assumptions and Limitations

For the Poisson distribution to be applicable, several assumptions must be met. Events must occur independently, at a constant average rate, and in a fixed interval. It is important to note that the Poisson distribution is not suitable for events with varying rates or those influenced by external factors.

In summary, the Poisson distribution is a powerful tool for modeling the probability of rare events within fixed intervals. By understanding its formula, applications, and limitations, one can effectively use this distribution to analyze and predict event occurrences in various scenarios.

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