Re: A Purpose For Frt Car Distribution Studies

Malcolm Laughlin <mlaughlinnyc@...>

It would appear that we are headed down the road of confusing average
and mean. Which are totally different. Given 10,000 freight cars past a given point, the average will most likely mimic the national fleet based on Tim and Dave's data. However, the mean may be skewed in one direction or the other significantly.

Tim's data doesn't say that. He has the percentages of system and foreign ownerships on line and off line. It's a big leap of faith to extrapolate that distribution of individual ownerships.

Malcolm Laughlin, Editor 617-489-4383
New England Rail Shipper Directories
19 Holden Road, Belmont, MA 02478

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