I've observed in many instance where my average speed for an activity in "Overview" view is different from the average speed shown in "Analysis" view.
For example, this activity has average speed 18.8 when viewed in Overview, but shows 19.1 when viewed in Analysis (without any time window truncation). I think the 18.8 (overview) is correct but I'm interested to understand how these two numbers are calculated and where the discrepancy comes from. Should the calculations be standardized?