condition mean min max ZT0-3 0.9222659187500001 0.24363848800000001 1.6008933495000002 ZT4-7 3.79012660375 3.131288964 4.4489642435 ZT8-11 9.71462128025 6.482560894000001 12.9466816665 ZT12-15 22.3553942525 18.943252065 25.76753644 ZT16-19 20.2775108425 18.26710166 22.287920025 ZT20-23 12.6965151425 11.561409274999999 13.83162101