condition mean min max ZT0-3 34.382349999999995 31.3586 37.406099999999995 ZT4-7 34.2508 34.2508 34.2508 ZT8-11 50.2676 50.2676 50.2676 ZT12-15 0 0 0 ZT16-19 64.20135 64.20135 64.20135 ZT20-23 42.0205 42.0205 42.0205