condition mean min max ZT0-3 698.3 698.3 698.3 ZT4-7 793.1 793.1 793.1 ZT8-11 774.15 774.15 774.15 ZT12-15 873.8499999999999 873.8499999999999 873.8499999999999 ZT16-19 831.8 831.8 831.8 ZT20-23 748.55 748.55 748.55