Thread: Sampling occurrence over time and repetition proof

Hi, this isn't a homework problem, but pure curiosity.

My friend is always on Facebook. I know this because I'm on often as well. However, as a joke, I posted a status saying she had no life. Another friend chimed in, with

if you knew she was always on facebook, wouldnt that mean that you're always on facebook??? think about that one

Now, I got to thinking. Is the a way, through statistics or some other method, to prove (or at least give a confidence level) that she IS on Facebook all the time, if I "sample," or check to see if she's currently online, every n minutes? Say that instead of me staying on as well, I just check it every 5 or 10 minutes, and then come to a reasonable solution that she spends most of her time on the site (ceteris paribus)?

I'm more asking for a logical answer to what the situation alludes, not necessarily to prove that she's on Facebook all the time.

I appreciate any input. Thank you!

If nothing else, whether you are on or not, you certainly are thinking about it. So, what you're really saying is that you are in love. Congratulations!