Open WiFi 2017: distribution by zone of average connection durations

The dataset aggregates the daily values using one column per zone. The zones from 1 to 9 correspond to the 9 administrative municipalities of Milan, the zone 10 instead corresponds approximately to a strip that goes from Piazza Castello to San Babila, and does not include the repeaters of zone 1. The columns marked with ALL show the daily totals. The unit of measurement used is the decimal fraction of sexagesimal hour.