Poisson Distribution Calculator
Enter the average rate (lambda) and the number of events (k) to compute exact and cumulative Poisson probabilities, plus distribution statistics.
Inputs
Results
P(X = k)
0.140374
P(X <= k)
0.265026
P(X > k)
0.734974
Mean (lambda)
5.0000
Variance
5.0000
Std Dev
2.2361
Last updated:
Frequently Asked Questions
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