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View Full Version : GPS vs. OBD speed (fun with math)


cwitte
11-04-2011, 03:57 PM
Random nerdy facts. I took a hour of data (one data point per 5 seconds) while on the interstate 80 yesterday coming back to the great of Nebraska (hey its my home) from Joliet and I found out the following: the GPS registered a 0.5604 mph difference (GPS faster than OBD) The confidence interval was (0.4873, 0.6335) at 95%. I used a paired T test to compare the data. The P value was 0, indicating a definate difference.

Other facts 2010 LB MT no new rims/tires yet. New wheels are next spring. :burnrubber:

In the unlikely event anyone is curious I can post my minitab file or export the date out into xls.

CrankyOldMan
11-04-2011, 07:00 PM
My initial reaction is to point my finger and scream "NERDS!!!!" but then I realized that I use statistics and calculus in my daily life for non school-related problems. =)

http://summitprojectsflashblog.files.wordpress.com/2009/03/ogre.jpg