Lies, Damned Lies, and Web Statistics 
Interpreting web statistics has been described as “trying to nail Jell-o to the wall.” Web log files trackfile accesses on the server. They do not track users; they do not track interest levels, they do not track success or failure communicating information. Caches “hide” site accesses from the server log and “hits” provide a poor mea sure of interest in particular content. Some people argue that there is really no meaning to server logs other than a measure of server load. However, even with all their flaws, some find web statistics useful in identifying how best to allocate resources in web site development.
Mazur, Beth. STC Proceedings (1997). Presentations>Web Design>Statistics>Log Analysis