condition mean min max ZT0-3 852.8 852.8 852.8 ZT4-7 720.3 720.3 720.3 ZT8-11 831.9 831.9 831.9 ZT12-15 674.75 674.75 674.75 ZT16-19 753.6500000000001 753.6500000000001 753.6500000000001 ZT20-23 932.85 932.85 932.85