(Note: there are 100 clicks displayed, separated by 1/10th of a second)
Answer: what is the expected number of arrivals in 10 seconds?
Answer: what is the expected time between arrivals?
Now run the experiment 20 times (click "play" button) and collect data to
answer:
Answer: What is the mean number of arrivals, averaged over all the experiments?
(Notice that the program collects this statistic for you - look at the
spreadsheet, "Data" column, after the 20th experiment.)
Answer: What is the mean length of the interval that contains t=3?
(On my computer, this is the interval that falls under
under the cursor that shows t=10, so it is easy to see.)
Answer: how does this compare to the mean time between arrivals? (About three
times as much? four?)