condition mean min max ZT0-3 0.19106145000000002 0.1141694 0.2679535 ZT4-7 0.456331 0.456331 0.456331 ZT8-11 0.4228275 0.4228275 0.4228275 ZT12-15 0 0 0 ZT16-19 0.4525805 0.4525805 0.4525805 ZT20-23 0.453961 0.453961 0.453961