condition mean min max ZT0-3 54.52315 54.52315 54.52315 ZT4-7 49.303442000000004 49.303442000000004 49.303442000000004 ZT8-11 46.6215385 46.6215385 46.6215385 ZT12-15 49.374963 49.374963 49.374963 ZT16-19 73.82275249999999 73.82275249999999 73.82275249999999 ZT20-23 82.7406235 82.7406235 82.7406235