For a science project, a high school research team conducted a survey of
local air temperatures. Based on the results of the survey, the team found that
the average temperatures were around 10 degrees higher than expected.
This result was wrong. The trouble with the survey was that most of the
locations were exposed to direct sunlight and located over asphalt or sand,
which resulted in higher temperatures than normal. This is a classic example
of an error in which phase of inferential statistics?