I am not aware of any sandboxes (unfortunately).One thought is to ask your future opportunity for an Analytics use login before you start. I also might suggest reviewing the Adobe Analytics Youtube channel: https://www.youtube.com/channel/UC8I6bqCk7gO6YdoMz6W5fvw .There are also paid trainings here:...

Adobe Analytics needs at least two image requests in a visit to calculate time spent. Time spent will continue to count event when a tab is in the background, *only if* the user comes back to the tab with 30 minutes and causes another image request. Another way to think about this is, the last page/...