Comment Assumptions out the window (Score 2) 76
Correlations are one of those simple statistical terms that lots of non-technical people like to throw around without actually knowing what it means. It's a wonderful tool that Google has provided for everyone but people need to remember what the basic assumptions are of correlations, namely a relatively normal distribution of scores and independence of observations. Independence is especially important if you're tracking search engine results because if you were to look at how many times people Google'd Randy Savage's name the day he died it would influence the subsequent day, ultimately biasing whatever other variable you decided to correlate it with.