Statistics and Probability

lunds002

1. The problem statement, all variables and given/known data

From January to September, the mean number of car accidents per month was 630. from Oct - Dec the mean was 810 accidents per month.

What was the mean number of car accidents per month for the whole year?



2. Relevant equations



3. The attempt at a solution

(630)(9) + (810)(3) = 675
12

Mark44

Looks good.

lunds002

Thanks, it just seemed too simple!