I have a problem with a goodness-of-fit question.. I have this question I need to answer but I have no idea how:
Why do we need to test the goodness-of-fit of a distribution of a random phenomenon to a parametric distribution (one where the distribution is known)?
I had the observations of a random variable of a completely random phenomenon, and I tested whether it fits the gamma distribution with a chi-square test. However, I have no idea how to explain why I needed to do that...
Could anyone give me a hint, please?