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Re:Could 'Oumuamua be an icy fractal aggregate ejected from ... by flatline on Tuesday February 19, 2019 @02:55PM (#19202190)
For a humorous take on what can be done with a sample size of 1:

http://www.thebigalientheory.com

Certainly, any new information is going to radically adjust the posterior probabilities, but you can still make some tentative inferences.

Re:Could 'Oumuamua be an icy fractal aggregate ejected from ... by rocqua on Tuesday February 19, 2019 @04:34PM (#19203050)
A quick scan didn't reveal my favorite sample size 1 statistic. If you sample serial numbers starting from 1 and sample N, the best guess is that there are 2N examples.

This was worked out in WW II for estimating tank production.