Calculates the Poisson cumulative distribution function.
For a Poisson distribution with a mean of 4, calculate the probability of P(X <= 8)
Value | Keystrokes | Display | Description |
---|---|---|---|
4.0 | λ | 4.0 | Stores the λ value. |
8 | k | 8.0 | Stores the k value. |
cdf | 0.9786 | Calculates the cdf. |
Given that the number of customers arriving per hour at a business is a Poisson distribution, if the probability of 3 or fewer customers arriving is 0.5, what is the mean?
Value | Keystrokes | Display | Description |
---|---|---|---|
.5 | cdf | 0..5 | Stores the cdf value. |
3 | k | 3.0 | Stores the k value. |
λ | 3.672 | Calculates the mean. |
Reference:
Poisson distribution - Wikipedia