Number of survey participants by years of experience in the coffee industry.
Sometime last week I sent out a link to a 12 question survey that asked participants to assign values to the importance of various aspects of the coffee shop experience.
There were 43 responses, only 13 of which were from non-coffee-industry folk.
Given that the link was distributed either via Twitter or through coffee industry acquaintances and friends, we are already dealing with a biased sample - but hey, it was quick and free.
This sample, however, must only be considered representative of a tiny subset of the coffee-shop-visiting population.