condition mean min max ZT0-3 3.57723 3.30911 3.84535 ZT4-7 0.929025 0.929025 0.929025 ZT8-11 0.711106 0.711106 0.711106 ZT12-15 0 0 0 ZT16-19 1.3784015 1.3784015 1.3784015 ZT20-23 2.6788499999999997 2.6788499999999997 2.6788499999999997