I believe that the random variables in this situation are the boxcar counts for each railroad. ================ The box car ownership counts themselves are highly biased. A significant

Average amd median are the same thing. total events/number of observations eg. you observe 100 trains and those trains have 273 ATSF cars in them. The average number of ATSF cars in a train is

Tim O'Conner says: "Mike Brock wrote Actually, it applies exactly to the Overland Route. Your samples are just too few to be statistically meaningful." My point again...as I've said from the first.

Posted by: "Gene Green" bierglaeser@... bierglaeser Sun Aug 17, 2008 8:07 am (PDT) --- In STMFC@yahoogroups. com, Anthony Thompson <thompson@.. .> wrote: I'm well aware of the

--- In STMFC@..., John Stokes <ggstokes@...> wrote: Again, the best and perhaps only lesson is to try to avoid the "iconic" cars when they were actually few in number, and balance your

the skewed better a most (and a 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

John Stokes writes: "This is the other factor in this essentially impossible and largely meaningless exercise in trying to figure out how many cars of each type would typically be seen on a train in

Posted by: "Bill McCoy" Diversions could be filed by the beneficial owner of the car's lading as shown on the Bill of Lading and reflected on the Waybill that accompanied the car. Up to 3

Wrong phrase, from an admitted statistical neophyte. I should have referred to the "law of large numbers". http://en.wikipedia.org/wiki/Law_of_large_numbers Steve Lucas. .--- In

Mike Brock wrote Actually, it applies exactly to the Overland Route. Your samples are just too few to be statistically meaningful. It's not even one day's worth of trains on the UP. The data do not

We've been down this road too -- most people take photos of stuff they happen to like, or that catches their interest. Almost no one took photos (and expended film) in order to document "typical"

Tim O'Connor writes: "Mike, he ran 100,000 iterations of a 40 car box car train, composed of cars chosen randomly from every possible prototype." OK. "The National % is obvious," OK. 3.9% for SP

This is the other factor in this essentially impossible and largely meaningless exercise in trying to figure out how many cars of each type would typically be seen on a train in the time period

Mike Brock wrote Mike, he ran 100,000 iterations of a 40 car box car train, composed of cars chosen randomly from every possible prototype. The National % is obvious, and then he finds the AVERAGE %

Tim O'Connor writes: "Good work, Larry! That's what I'm talkin' 'bout! A 40 car train with 9 SP (not counting T&NO) box cars.." I assume you mean a train with 40 box cars. Actually the 1949 trains

Steve Lucas writes: "Tony-- After reading this thread for some time, I have to agree with your basic premise. Most major through transcon routes such as the UP in Wyoming would very likely have over

Larry Ostresh writes: "I ran my "random train" Excel program for 100,000 iterations to test whether it was working OK. The average number of boxcars per train, by railroad, seemed to properly mirror

type (e.g. 11, 21, 27, etc). If that exists let me know and I'll search for it - there is a wealth of data in this site - it could use a full word index system for quicker and more accurate

Thank you Tony. What car class was that equivalent to on the SP? Sincerely, Rich Yoder 7 Edgedale Court Wyomissing PA 19610-1913 610-678-2834 after 6:00PM est until

Thanks. I must be thinking of the 70 ton trucks. Brian J Carlson P.E. Cheektowaga NY