I want to know how long it takes an average user to create an account. Basically, I have a registration page and a successful registration page after submission. How can I see the average time on page on the registration page in sessions where the next page is the success page? Thanks.
You have to create a segment defining the sequence of the pages. At that point, having in the reports only the data of your interest, you can check in the 'All pages' report the time on the page for the registration page (which will only refer to that page for actually registered users).