Example: I have a list of 20,000 dates, such as "X was modified on", or "X was created on". But it's possible one of the dates is being used as a "default" or "null" value.
How would I find the default/null value without already knowing it?
To frame the question another way:
How do I determine if one of the dates is occurring unusually often?
Or, how do I determine that the quantity of one date is unusual?
It seems like the probability density function should fit in here somewhere. Is there a way to determine the distribution of the dates without knowing beforehand if they're "normal" or "uniform"?