# Poisson parameter 𝜇 and expected occurrence of an event

In a CSV file there is data that shows only months and number of traffic accidents in each month.

What is the expected number of accidents per month if they are distributed with a Poisson distribution parameter μ?

They also ask: according to the data in CSV file, the average traffic accident per month is 7. How can we use this to estimate the μ?

• I think more information is needed. Is the $\mu$ referencing one month or some other time period? – lulu Feb 4 at 22:03
• Well, in that case you can guess that it refers to one month in which case $\mu$ is the expected number of accidents over the month, just as you said. – lulu Feb 4 at 22:30