That's the ripest mis-application of statistical distributions I have seen since reading 'Lies, Damned Lies and Statistics' for my degree...60117 Bois Roussel wrote:So if you are modelling the LNER in the 1930s, you need to get 51 other types, mostly non-LNER, to sit alongside a single D.39.
That is the equivalent of saying that there were 5,000 different types of locomotives and only 1,250 of those were LNER and so you need to have 3 non-LNER locomotives for every one that is LNER on your LNER-based layout.
Distributions were heavily skewed towards use of own-company stock and the geographical distribution would be such as to cluster the stock nearest to home territory.