I've been looking at the Visitor Flow report in Google Analytics, but something doesn't add up.
For the starting pages it says that there were 181K visits and 123K drop-offs. If the starting page is the first page visited on the site and the drop offs are people who leave the site, this suggests to me that you can calculate the bounce rate from these figures. I calculate the bounce rate to be (123K/181K) x 100 = 68%. However, the bounce rate for the site given in the overview report is actually 19.89%.
Can anyone explain why the actual bounce rate is different from my calculated bounce rate (calculated using the drop off and starting page visits)? I must have made an incorrect assumption somewhere, but after a lot of head scratching I still can't see where!