Lets say I have a website which gets 100 hits per day (mu = 100). Yesterday my website got 130 hits (x = 130). If I assume a Poisson distribution, then the probability of getting 130 hits is:
> dpois(130, 100)  0.0005752527 # about 0.06%
So this tells me that getting 130 hits is quite unusual for my website due to the low probability.
My understanding of statistical significance is that it is used to determine whether the outcome of an experiment is due either to chance or some kind of deterministic relationship.
- How would I apply that in this situation?
- What test should one use? (and is it in R?)
Many thanks in advance for your time.
Note: I saw someone at a business talk asked something very similar to this and I had no idea what they meant by it, and so now I'm just trying to educate myself. I'm new to R, but that seems like the software most used for these kind of questions, hence my request.