Nothing
dpois(0,6/3) # 0 customers in 1/3 hour
dpois(2,6/3) # 2 customers in 1/3 hour
1-ppois(6,6) # more than 6 in 1 hour
dpois(6,6) # exactly 6 in 1 hour
ppois(5,6) # less than 6 in 1 hour
ppois(30,24) - ppois(19,24) # 20 to 30 customers in 4 hours
Any scripts or data that you put into this service are public.
Add the following code to your website.
For more information on customizing the embed code, read Embedding Snippets.