Avoiding common data-interpretation errors
A Smart Bear: Startups and Marketing for Geeks
MARCH 29, 2010
You can't open an analytics tool without being attacked by averages: Average hits/day, average conversion ratios, average transaction size, average time on site. However, in the middle of the period the student hired a tutor. Blindly applying statistics doesn't explain what's happening. Charts can help.
257 
Let's personalize your content