GPS vs. OBD speed (fun with math) - Toyota Yaris Forums

cwitte · 11-04-2011, 02:57 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.

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

CrankyOldMan · 11-04-2011, 06:00 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. =)

11-04-2011, 02:57 PM	#1
cwitte Newbie DIYer Drives: 2010 Yaris LB MT Join Date: Dec 2010 Location: Waverly NE Posts: 33	GPS vs. OBD speed (fun with math) 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. In the unlikely event anyone is curious I can post my minitab file or export the date out into xls.

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11-04-2011, 06:00 PM	#2
CrankyOldMan 2ZR swap. DO IT! Ask how! View User's Garage Drives: 09 Meteoric Metallic HB Join Date: Feb 2011 Location: West Michigan Posts: 2,333	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. =)