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Old 11-12-2012, 08:18 AM
sirbikes sirbikes is online now
Officially Welcomed to the 'Fest
Location: Wilmington, NC
 
Join Date: Aug 2012
Posts: 129
Mein Auto: 2011 X5 35d
Here are my fill-ups before and after the update and SCR Mixer recall. There is no statistically significant difference. Next step is to get the latest (October 2012) open recall -- software update for the emissions and see if it improves. I was hoping someone else did it before me and could provide feedback. There's no going back if mpg heads the wrong way.

before after
22.22 21.96
21.28 23.70
25.76 25.31
25.41 23.86
23.35 25.95
23.17 25.01
25.34 23.23
23.54 25.15
24.70


Two Sample T-Test and Confidence Interval

Two sample T for before vs after

N Mean StDev SE Mean
before 8 23.76 1.62 0.57
after 9 24.32 1.24 0.41

95% CI for mu before - mu after: ( -2.08, 0.96)
T-Test mu before = mu after (vs not =): T = -0.79 P = 0.44 DF = 13

Last edited by sirbikes; 11-12-2012 at 08:20 AM.
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