[pacaro]

IIRC a lot of our data about human splenectomy comes from World War II, where it was performed often enough that some long term followups were possible with sufficiently large n

[rhn_mk1]

umbers.

[_Microft]

That was more than likely not a typo. n is used like this in some fields:

https://en.wikipedia.org/wiki/N#Other_uses

[HPsquared]

Specifically in statistics, lowercase n refers to sample size.