Appendix A.23

Poisson Probability Calculator

Calculate Poisson probabilities for modeling rare events with a known average rate.

Average Rate (

)

Occurrences per interval unit

Interval Length (

)

Number of units (e.g., hours, sq meters)

Target Successes (

)

Mean (

)

Std Dev (

)

Exact

Less Than

At Most

More Than

At Least

Based on formula