A meaningless correlation: Bloomsday participants versus Spokane Airport passenger counts

Chart shows annual Bloomsday event participants versus annual Spokane International Airport passenger counts, scaled to fit on the same chart.

Is the correlation random?  Probably.

Here is an updated Spokane International Airport historical passenger count trend line. Updated through end of year 2010.  For January and February 2011, passenger counts are running slightly below 2010 levels (not shown in chart). SIA passenger traffic remains roughly flat for 15 years and is a proxy indicator of the state of Spokane’s economy. In other words, Spokane’s economy is roughly flat for 15 years.

Here is airport traffic operations (e.g. takeoffs and landings) for Felts Field trend line:

Data for both charts comes from SpokaneAirports.Net.


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