Use case for unclear if distribution fitted

[sangeetabhatia03]

When it is unclear if data are fitted to distribution and we have summary stats; the goal is to show that with the same mean and SD, you can get different behavior in the tail

[ruthmccabe]

Really like this!! Also similar to my incubation period one (This one waaaay better) so maybe can look at combining

[joshwlambert]

I'm going to merge this code so we can use it to update the CFR use case as we all agreed earlier when discussing merging some of the use cases.