condition mean min max ZT0-3 537.2 537.2 537.2 ZT4-7 902.0 902.0 902.0 ZT8-11 912.55 912.55 912.55 ZT12-15 736.8 736.8 736.8 ZT16-19 772.4000000000001 772.4000000000001 772.4000000000001 ZT20-23 736.05 736.05 736.05