So this is pretty interesting...
(again, p-value from a two-sample t-test in STATA)
I wonder how much 'real-world' significance this has and how much of the difference is actually due to different regions/dive conditions, since both unadjusted air consumption rates and depth-adjusted 'surface air consumption' (SAC) rates* appear to be lower in warm water (with some variation). I think this one will have to sit on the shelf for a while...more data to come late Spring and Summer when I start getting in the water again.
* and here is the graph of SAC rates by temperature, data from the overall Fall 2009-Summer 2010 year that was used for the graphs of original unadjusted and adjusted SAC rates.
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