Free Republic
Browse · Search
News/Activism
Topics · Post Article

Skip to comments.

Most Science Studies Appear to Be Tainted By Sloppy Analysis
Wall Street Journal Online - Science Journal ^ | Sept. 14, 2007 | ROBERT LEE HOTZ

Posted on 09/14/2007 3:21:08 AM PDT by gridlock

click here to read article


Navigation: use the links below to view more comments.
first previous 1-2021-4041-6061-62 last
To: No Truce With Kings

Just out of curiosity, was there ever an attempt to use the data from multiple shuttle runs and rather than fit a line thorugh each run, do a partial least squares model across all the runs?


61 posted on 09/17/2007 7:17:18 AM PDT by doc30 (Democrats are to morals what an Etch-A-Sketch is to Art.)
[ Post Reply | Private Reply | To 54 | View Replies]

To: doc30

“Just out of curiosity, was there ever an attempt to use the data from multiple shuttle runs and rather than fit a line thorugh each run, do a partial least squares model across all the runs?”

That’s what we did — which is why I analogized it to the stock market. You could get a good average fit for prior data but it was always useless for predicting how the next flight would go. Too many variables affecting thing — inclination, altitude, sun angle, atmospheric density, landing time, ascending vs descending node landing, and probably a bunch of other stuff that we did not even know about.

It looked pretty, sounded impressive — and was absolutely fricking useless.


62 posted on 09/17/2007 7:41:45 AM PDT by No Truce With Kings (The opinions expressed are mine! Mine! MINE! All Mine!)
[ Post Reply | Private Reply | To 61 | View Replies]


Navigation: use the links below to view more comments.
first previous 1-2021-4041-6061-62 last

Disclaimer: Opinions posted on Free Republic are those of the individual posters and do not necessarily represent the opinion of Free Republic or its management. All materials posted herein are protected by copyright law and the exemption for fair use of copyrighted works.

Free Republic
Browse · Search
News/Activism
Topics · Post Article

FreeRepublic, LLC, PO BOX 9771, FRESNO, CA 93794
FreeRepublic.com is powered by software copyright 2000-2008 John Robinson