# Poisson Distribution Calculator

To calculate the probability of observed data, use the Poisson distribution calculator. It calculates all the possible probabilities like, for exact, at most, for more than, less than, or at least.

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## How to use the Poisson distribution calculator?

For the calculation of the probability of given data, you must follow the below steps.

- Select the “type of probability” from the drop-down menu.
- Enter the value of “λ”
- Enter the “Poisson random variable (x)” (x must be positive).
- To the result click on the “calculate” button.
- Click on the reset button and erase all the inputs/outputs.

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