From my experience 2 hours should be enough for the main analysis.
This includes: explaining what we did, and explaining how to write everything in APA style.
Sometimes we need extra time to prepare the data. Think about calculating new variables.
This data preparation process could take an aditional hour.
Last, in 20% of the cases the supervisor wants some changes/ additions to what we did so far. In that case you have to come back for half an hour to finish the job.