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Old 08-13-2008, 11:48 PM   #19 (permalink)
Concrete
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Join Date: Jun 2008
Location: Kansas
Posts: 177

The Truck - '00 Chevy S10 Extended Cab
90 day: 22.47 mpg (US)
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Standard Deviation Calculations

I have been putting off the standard deviation calculations
I have a lot of excuses as to why - but really it was just putting it off

There are a lot of ways to do this
- especially since my out bound and return routes are similar but not identical paths

lets do it the easy way

all wheel cover data = ave 29.3 mpg - std dev .63
all without covers data = ave 28.0 mpg - std dev .27

Darin - thanks for the reminder that spreadsheets do std Dev calcs
other wise I would still be putting this off
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